MJR Tumblers Refill Grit Kit – 12,000 Grit Extreme Aluminum Oxide Polish for 6lb Rock Tumblers

Premium polish kit for 6lb rock tumblers

The MJR Tumblers Refill Grit Kit is a complete, pre-measured polishing system designed for hobbyists and crafting enthusiasts who want consistent, bright finishes on rocks, agates, and cabochons. Central to this kit is our exclusive 12,000 grit sub micron aluminum oxide polish, formulated to cut smoothly and reveal color and texture without excessive wear.

What’s in the 6lb kit

• 6 oz of coarse 60/90 silicon carbide grit
• 6 oz of fine 120/220 silicon carbide grit
• 3 oz of pre polish 400/600 silicon carbide grit
• 3 oz of exclusive 12,000 grit aluminum oxide polish

Key benefits you may notice

• Pre measured for quick pour and roll setup
• Designed to work with rotary and vibratory 6lb tumblers
• American-made by a Disabled and Veteran Owned company
• Clearly written polishing instructions with practical tips
• Single kit covers all four stages for convenience

How to use

Pour the contents as directed and run the tumbler. Check progress between stages and adjust timing as needed. The system is built to minimize guesswork and support steady, repeatable results.

Real-world use cases

Ideal for polishing rough stones and fossils, smoothing pebbles for display, or preparing cabochons for craft projects. The four-stage progression, finished with the 12,000 grit polish, can help you achieve a bright, smooth surface with preserved color and natural texture.

About MJR Tumblers

Based in Pecatonica, Illinois, MJR Tumblers is a Disabled and Veteran Owned American company. The brand emphasizes practical polishing solutions and clear guidance. Every purchase includes easy-to-follow instructions and tips to help you get the most from your kit.

Ready to upgrade your polishing sessions with a trusted, US-based maker? This kit combines straightforward setup with a premium polish that may yield satisfying results without the guesswork.