Thumler's Tumbler 4-step Grit & Polish Kit ( AR12 & Model B)
Get beautifully polished stones every time with the Thumler’s Tumblers 4-Step Grit Kit—sized perfectly for the AR12 and Model B rotary tumblers. Each packet is pre-measured for a single large-barrel load, giving you a clean, consistent, and hassle-free tumbling experience from start to finish.
This all-in-one kit includes everything you need to take your rough stones from raw to radiant.
Each kit includes four premium polishing stages:
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16 oz. Coarse Grit (60/90 Silicon Carbide) – Shapes and smooths rough stones.
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16 oz. Medium Grit (120/220 Silicon Carbide) – Refines and removes coarse scratches.
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8 oz. Pre-Polish (500 Aluminum Oxide) – Prepares surfaces for a brilliant shine.
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8 oz. Polish (Aluminum Oxide) – Delivers a professional, mirror-like finish.
Engineered to work perfectly with Thumler’s large rotary tumblers—including the AR12 and Model B—this grit kit offers consistent, high-quality results for both beginners and experienced rockhounds. It’s also compatible with most other large-capacity rotary tumblers on the market.
Highlights:
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Complete 4-stage tumbling system
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Professional-grade silicon carbide and aluminum oxide
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Pre-measured packets for large barrels
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Compatible with most large rotary tumblers
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Made in the USA