This rock tumbler refill kit includes 1.5 lbs of Polly Plastics 3/16" x 3/8" angle-cut ceramic pellets—ideal for cushioning and protecting delicate stones during tumbling. These reusable pellets act like tiny ball bearings, promoting smooth, even tumbling and improving results in vibrating tumblers by reducing damage to your gemstones.

Also included are all four essential grits needed to tumble and polish up to 15 lbs of rock:

• Ceramic Media Rock Tumbling
• Step 1: 1 lb coarse 60/90 silicon carbide grit
• Step 2: 1 lb medium 180/220 silicon carbide grit
• Step 3: ½ lb pre-polish 500 silicon carbide grit
• Step 4: ½ lb fine aluminum oxide 1200 polishing powder