This item will be shipped within One Week Returns Subject to 15% restocking Fee RCSM-12GRR Rubber Cartridge Wide Inner Ring Ball Bearing GRIP-IT 360 Degree Locking 3/4" Inch Inner Diameter RCSM-12GRR Rubber Cartridge Wide Inner Ring Ball Bearing, bearing is cylindrical Cartridge interliner made of 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 Wide inner ring, Standard seal is RST tight riding, full cover, and metal shroud seals.