Fundamental Rockhound Products: 4 Step Rock Tumbling GRIT KIT with 2 lb Mixed Ceramic Media - Enough to Polish up to 10 pounds of Rock! Refill High Quality Rock Tumbling Grit Kit to tumble up to 10 pounds of rock. You will receive 1 pound coarse grit, 1 pound medium grit, 1 pound fine grit, 1.2 oz grit saver, and 1/2 pound Aluminum Oxide tumble polish, 2 lb mixed size Ceramic Tumbling Media, plus instructions. All supplies are packaged in heavy-duty resealable zipper bags. Ceramic Media is used for cushioning delicate stones or as filler. You can use the same Ceramics in all stages. Basic Tumbling Instructions are included