MJR Tumblers
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Rock Tumbler Grit Kit Refill with 12,000 Grit Polish, Silicon Carbide & Aluminum Oxide, Stone Polishing Kit with Plastic Pellets for 12lb Rotary & Vibratory Tumblers
Rock Tumbler Grit Kit Refill with 12,000 Grit Polish, Silicon Carbide & Aluminum Oxide, Stone Polishing Kit with Plastic Pellets for 12lb Rotary & Vibratory Tumblers
Rock Tumbler Grit Kit Refill with 12,000 Grit Polish, Silicon Carbide & Aluminum Oxide, Stone Polishing Kit with Plastic Pellets for 12lb Rotary & Vibratory Tumblers
Rock Tumbler Grit Kit Refill with 12,000 Grit Polish, Silicon Carbide & Aluminum Oxide, Stone Polishing Kit with Plastic Pellets for 12lb Rotary & Vibratory Tumblers
Rock Tumbler Grit Kit Refill with 12,000 Grit Polish, Silicon Carbide & Aluminum Oxide, Stone Polishing Kit with Plastic Pellets for 12lb Rotary & Vibratory Tumblers
Rock Tumbler Grit Kit Refill with 12,000 Grit Polish, Silicon Carbide & Aluminum Oxide, Stone Polishing Kit with Plastic Pellets for 12lb Rotary & Vibratory Tumblers
Rock Tumbler Grit Kit Refill with 12,000 Grit Polish, Silicon Carbide & Aluminum Oxide, Stone Polishing Kit with Plastic Pellets for 12lb Rotary & Vibratory Tumblers
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Rock Tumbler Grit Kit Refill with 12,000 Grit Polish, Silicon Carbide & Aluminum Oxide, Stone Polishing Kit with Plastic Pellets for 12lb Rotary & Vibratory Tumblers
Rock Tumbler Grit Kit Refill with 12,000 Grit Polish, Silicon Carbide & Aluminum Oxide, Stone Polishing Kit with Plastic Pellets for 12lb Rotary & Vibratory Tumblers
Rock Tumbler Grit Kit Refill with 12,000 Grit Polish, Silicon Carbide & Aluminum Oxide, Stone Polishing Kit with Plastic Pellets for 12lb Rotary & Vibratory Tumblers
Rock Tumbler Grit Kit Refill with 12,000 Grit Polish, Silicon Carbide & Aluminum Oxide, Stone Polishing Kit with Plastic Pellets for 12lb Rotary & Vibratory Tumblers
Rock Tumbler Grit Kit Refill with 12,000 Grit Polish, Silicon Carbide & Aluminum Oxide, Stone Polishing Kit with Plastic Pellets for 12lb Rotary & Vibratory Tumblers
Rock Tumbler Grit Kit Refill with 12,000 Grit Polish, Silicon Carbide & Aluminum Oxide, Stone Polishing Kit with Plastic Pellets for 12lb Rotary & Vibratory Tumblers
Rock Tumbler Grit Kit Refill with 12,000 Grit Polish, Silicon Carbide & Aluminum Oxide, Stone Polishing Kit with Plastic Pellets for 12lb Rotary & Vibratory Tumblers
If you want the best, MJR Tumblers 12,000 Grit Aluminum Oxide Extreme Polish is what you need!
Rock Tumbler Grit Kit Refill with 12,000 Grit Polish, Silicon Carbide & Aluminum Oxide, Stone Polishing Kit with Plastic Pellets for 12lb Rotary & Vibratory Tumblers
Item #: 88262637

Rock Tumbler Grit Kit Refill with 12,000 Grit Polish, Silicon Carbide & Aluminum Oxide, Stone Polishing Kit with Plastic Pellets for 12lb Rotary &

86% of respondents would recommend this to a friend

Item #: 88262637

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What Stands Out

Premium Quality
Crafted from high-grade aluminum oxide, this grit kit ensures consistent and reliable results, revolutionizing your rock tumbling experience with professional-grade polish that outperforms standard alternatives.
Extreme Polish
Achieve an unparalleled shine with the 12,000 grit formula, designed to deliver exceptional polish on rocks, enhancing the beauty and clarity that hobbyists and professionals demand.
Targeted Compatibility
Designed specifically for 30lb rock tumblers, it optimizes efficiency and performance, pairing perfectly with silicon carbide and plastic pellets for a complete tumbling solution that meets user expectations.

Product Details

Shop Rock Tumbler Grit Kit Refill with 12,000 Grit Polish, Silicon Carbide & Aluminum Oxide, Stone Polishing Kit with Plastic Pellets for 12lb Rotary & Vibratory Tumblers online at a best price in Tonga. B07F3LFSQ7
Brand NameMJR Tumblers
Age Range DescriptionKid
Number of Packs1
Set Name12 Pound Tumbler Kit
ManufacturerMJR Tumblers
Unit Count1 Count
Manufacturer Part NumberMJR12pgkp
Manufacturer recommended age12 months - 10 years
Educational Objectivecreative thinking
Power SourceAC adapter
Supported Battery TypesNo batteries required
Operation ModeManual
Indoor Outdoor UsageIndoor
ThemeRock Tumbling
ColorBlack
Sizefor 12lb barrel
Item Weight3 pounds (1.36 kg)
Material TypePlastic Pellets, Silicon Carbide

Who Should Buy?

Suitable For
  • Rock Tumblers

    Perfect for users with 30lb rock tumblers looking for high-quality polishing results with extreme grit.

  • Professional Use

    Ideal for professionals seeking unparalleled polish results on rocks and minerals for jewelry and display.

  • Hobbyist Enthusiasts

    Great for hobbyists dedicated to rock tumbling, looking for premium polishing capability to enhance their collections.

Not Suitable For
  • Casual Users

    Not suitable for casual users looking for a quick, low-effort polishing solution without careful handling.

Product Description

Have any Query? Chat with us

Customer Questions & Answers

  • Question: What is the MJR Tumblers Refill Grit Kit used for?

    Answer: The MJR Tumblers Refill Grit Kit is designed to enhance the polishing process of stones, gems, and rocks using a high-quality 12,000 grit aluminum oxide polish. This fine grit is ideal for achieving an ultra-smooth finish on various materials, making it suitable for hobbyists and professional jewelers alike. By using this grit, users can achieve a brilliance and clarity that highlights the natural beauty of each specimen. It's particularly beneficial in jewelry making and lapidary work, where the polish can significantly elevate the appearance of finished pieces.
  • Question: How does the MJR Tumblers Grit Kit compare to other polishes?

    Answer: The MJR Tumblers Grit Kit stands out due to its premium quality aluminum oxide composition, which provides superior polishing results compared to standard grit options. With a grit rating of 12,000, it is designed for ultra-fine polishing, which places it at a higher level than many common polishing grits. This allows for a more professional finish, promoting a mirror-like shine that is essential in finer stone jewelry. Whether for personal use or for crafting projects, the quality of the polish ensures a noticeable difference in the final output.
  • Question: Is this polish safe to use on all types of stones?

    Answer: Yes, the MJR Tumblers Refill Grit Kit is safe for use on a variety of stones, including softer materials and harder gems. The aluminum oxide polish is non-reactive and operates gently enough to prevent damage while still providing effective polishing. However, it's advisable to perform a small test on less common or softer stones to ensure compatibility. This versatility makes it ideal for lapidary enthusiasts who work with different types of stones and want consistent, high-quality results across their projects.
  • Question: How much polish is included in the MJR Tumblers Grit Kit?

    Answer: The MJR Tumblers Grit Kit comes with a substantial amount of polish designed for multiple uses, making it a practical choice for serious users. The 40-pound quantity is sufficient for numerous polishing batches, depending on the size and number of stones being processed. This bulk amount ensures that users do not frequently need to reorder, allowing for uninterrupted polishing sessions. Whether you're working on small jewelry pieces or larger rock collections, this supply will last through many projects.
  • Question: What tools do I need to use with the MJR Tumblers Grit Kit?

    Answer: To effectively use the MJR Tumblers Grit Kit, you'll need a rock tumbler, which is essential for evenly applying the polishing grit to your stones. Additionally, having a set of safety goggles and gloves can enhance user safety during the polishing process. It’s often recommended to wash the rocks before and after polishing to remove any residue. This combination of tools allows you to achieve optimal results, ensuring that your polishing endeavors are successful and efficient.
  • Question: How should I store the MJR Tumblers Refill Grit Kit?

    Answer: It’s important to store the MJR Tumblers Refill Grit Kit in a cool, dry place to maintain its effectiveness. Keeping it sealed in its original container or transferring it to an airtight container can prevent moisture absorption, which might affect the polishing quality. Additionally, label the storage container to avoid mix-ups with other materials. Proper storage ensures that your polish remains usable and provides high performance whenever you're ready for another polishing session.
  • Question: Can I mix different grits in one tumbling batch?

    Answer: It is not recommended to mix different grits during a single tumbling batch as each grit has a specific purpose and polishing stage. Mixing can lead to subpar finishes, as finer grits require a clean slate to achieve the desired polish. Typically, tumbling involves starting with a coarse grit and progressively moving to finer grits, culminating in the 12,000 grit polish for the final shine. Following this approach will yield the best results and keep your stones looking their very best.
  • Question: What sizes of stones are best suited for the MJR Tumblers Grit Kit?

    Answer: The MJR Tumblers Grit Kit is designed for use with a range of stone sizes, generally accommodating pieces that fit comfortably within your tumbler. For the best results, stones should ideally be about 1 to 3 inches in size, allowing for effective tumbling and polishing action. Smaller stones can be included, but ensure they do not exceed the maximum tumbler capacity or remain too loose, as this can affect the efficiency of the polishing process.
  • Question: How long does the polishing process take with the MJR Tumblers Grit Kit?

    Answer: The polishing process time varies significantly based on the type of stones and their initial condition. Generally, you can expect the tumbling process using the MJR Tumblers Grit Kit to take between one to several weeks. Each stage, from coarse to fine grit, may require multiple days to ensure that stones are polished to perfection. Patience is key to achieving the superior results for which this premium kit is recognized, as rushing the process can negatively affect the final finish.
  • Question: Where can I buy MJR Tumblers Refill Grit Kit in Tonga?

    Answer: You can purchase the MJR Tumblers Refill Grit Kit from Ubuy, a reliable platform that offers a wide variety of products including high-quality polishing materials. Ubuy provides convenient access for customers in Tonga looking for premium polishing solutions. With user-friendly features and secure payment options, Ubuy ensures that you can easily find the MJR Tumblers Grit Kit to meet your polishing needs.

MJR Tumblers Tumbling Media Editorial Review

Refill Grit Kit Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Polish for Unparalleled Results is an essential product for rock tumblers designed specifically for 50lb barrels. Users appreciate the high-quality aluminum oxide polish which ensures exceptional results in gemstone polishing. The kit includes very detailed instructions that effectively eliminate confusion, providing valuable tips on achieving the perfect finish. Many have praised the product for its comprehensive packaging and reliable customer service. With a focus on developing patience and attention to detail, this kit is perfect for both beginners and experienced hobbyists looking for effective polishing solutions.

Customer Reviews & Ratings

229 customers ratings
  • 5 Star
    76%
  • 4 Star
    13%
  • 3 Star
    6%
  • 2 Star
    4%
  • 1 Star
    1%

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Pros

  • High-quality aluminum oxide for superior polishing
  • Includes clear and helpful instructions
  • Ideal for 50lb rock tumblers
  • Enhances gemstone polishing experience

Cons

  • Quantity of included plastic pellets may vary

Platform Trust & Buyer Confidence

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4.2/5 9477 reviews
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“Great products and very good service: very easy and very fast international delivery.”

9 September 2026 · via Trustpilot
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“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”

11 September 2026 · via Trustpilot
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Adele
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“Easy to find and order what you want on the website. Delivery is quick to the UK”

8 September 2026 · via Trustpilot
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Order now and get it around Wednesday, October 07

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Features & Benefits

  • Exclusive 12,000 Grit Sub Micron Polish for superior results.
  • Premeasured components for ease of use with any tumbler.
  • Includes various grades of silicon carbide grit for all polishing stages.
  • American-made by a Disabled and Veteran Owned Company.
  • Comes with free, easy-to-follow instructions and tips.
  • Each kit contains a total of 3lbs, providing everything you need.

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