Rock tumbler kit includes 1)1 Pound of Grit #1 60/90 mesh silicon carbide 2)1 Pound of Grit #2 120/220 silicon carbide 3) 8 Oz of Pre-Polish Grit #3 500/600 silicon carbide 4) 8 Oz of Polish Step #4 1200 Aluminum Oxide 5)Polyurethane Pellets 2 lb. 6)1 Pound of beautiful MOHAGONY OBSIDIAN ROCKS This is all the grit you need for 15 pounds of rock tumbling . HAPPY TUMBERLING !