Hard rubber barrel handles up to 3 lbs capacity, with minimal noise and a long-lasting, durable motor. Simple to operate and offers the user economical performance. The rock tumbler runs quietly at a low speed thanks to its rubber tumbler barrel. Provides a smooth, polished finish to rocks, semi-precious stones, glass, and even metals and jewelry pieces. The cutting edge design allows it to run for days at a time to ensure a smooth finish. Tumbler Size: 9-1/4” x 5-3/4” x 2-1/2”, Barrel Size: 4-3/4” in height x 4-1/2” in diameter.