This item will be shipped within One Week Returns Subject to 15% restocking Fee FH203-17mmG Insert Bearing Eccentic Locking Collar 17mm Inner Diameter FH203-17mmG Insert Bearing, bearing is Eccentic Locking Collar, bearing is narrow inner ring with Spherical outer ring, bearing is standard load capacity, bearing is relubrication groove with oil hole on locking collar side(shown), bearing is oil hole opposite groove makes it interchangeable with all manufacturers, bearing is nylon patched class 3A set screws, Standard seal is RST tight riiding, full cover and metal shroud seals.