For sale is a Motor Friction ring compatible for rotary tumblers such as NSI 635, 625 Rolling Stones, Smithsonian Rock Tumblers.

This ring allows the barrel to spin, simply remove the old or damaged ring, and 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.

Sale contains one (1) motor friction ring, no barrel, no tumbler, just the replacement part.

Please ask any questions prior to purchase.