For sale is a friction wheel compatible for the National Geographic brand "Starter" rock tumbler. This wheel allows the barrel to spin, simply remove the old or damaged wheel by prying it off with a needle nose plyers, or flat head screwdriver. Then slide on the new, synthetic rubber( will never dry out) ring and start tumbling again. This is not OEM, but rather a stronger synthetic Buna Nitrile synthetic rubber. Last 2 photos is not part of the sale, it is for visual reference as to the model that this friction wheels will fit. Sale contains 1 friction ring, no barrel, no tumbler, just the replacement part. Please ask any questions prior to purchase.