This is a professional grade rock tumbling /polish for use with any tumbler, This kit will polish up to 30 pounds of rock to a Glass like finish. This polish works best for quartz, jasper, agates, Apache tears and similar stones. **This Set Will Polish** **30 lbs. Of Stones** **To A Mirror Like Finish** Don't Be Fooled By Others Grits On The Market That Offer Larger Quantities of Grit, This Is The Correct Amount Needed For High Quality Grit, If You Purchase Lower Quality Grit, You Will Need To Purchase Up To 4 Oz. Of Each Type Of Grit Per Three Pounds. Includes Free Polishing Directions and Measuring Chart This sale contains enough grit to polish two 15 lbs tumbles or 10 batches in a 3lb tumbler. The HIGH quality grit included is as follows: 16 Oz. Silicon Carbide 500F (Pre-Polish /3rd Grind) Sale Is For One (1) Brand New Polish Grit set, NO Tumbler, No Other Parts, Just What is In The Pictures.