SER-55mm-ZMKFF Bearing Insert Free Spinning 55mmThis item will be shipped within One Week Returns Subject to 15% restocking Fee SER 55mm ZMKFF Bearing Insert Free Spinning Set Screw Locking 55mm Inner Diameter SER 55mm ZMKFF Bearing Insert Free Spinning, Bearing is Standard load capacity, bearing is Wide inner ring with Cylindrical outer ring and snap ring, Bearing is manuufactured with light grease fill to ensure free running and low drag, bearing is black oxide plated inner and outer rings,