RCSM-18S Rubber Cartridge Narrow Inner Ring 1-1/8" BearingThis item will be shipped within One Week Returns Subject to 15% restocking Fee RCSM 18S Rubber Cartridge Narrow Inner Ring Ball Bearing Set Screw Locking 1 1 8" Inch Inner Diameter RCSM 18S Rubber Cartridge Narrow Inner Ring Ball Bearing, bearing is cylindrical Cartridge interliner made from conductive rubber, it uses to dissipate static, it reduces noise and vibration, bearing is use in many fan, blower and other HVAC applications, bearing is narrow