The CYCLONE MINI-POLISHING DRUM SLEEVE & ADAPTER is designed for granite and engineered stone. Ideal for tight radius. WET use only. Each sleeve measures: 3/4" D x 1-1/2" L. Dual Fitting: 1/2"gas & 5/8"-11. RPM: 3,000. Adapter Length: 4". Adapter Fitting: 5/8" Inner thread + 1/2" gas out