This item will be shipped within One Week Returns Subject to 15% restocking Fee UC201-12mm Bearing Insert Set Screw Locking 12mm Inner Diameter UC201-12mm Bearing Insert, Bearing is standard duty, bearing is Wide inner ring with spherical outer ring, Bearing is relubrication groove with oil hole on set screw side, bearing is nylon patched class 3A set screw, Standard seal is R-Seal.