MJR Tumblers Refill Grit Kit for 15 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish

The MJR Tumblers Refill Grit Kit is a good product, with most customers stating that their rocks came out smooth and with a good finish after the first three grit steps. However, some customers noted that the last polishing step did not give their rocks a shiny finish despite running it for several weeks. The product includes 3.4 lbs of grit in four different stages (coarse, medium, fine, and polish) and the instructions recommend using 1 tablespoon per pound of rocks for the first grit step. The company is based in Illinois, but it appears that some supplies are sourced from elsewhere. Overall, customers were happy with the product's performance, although some noted that the amount of grit provided in the kit was much less than expected.