Zinc Alloy Housed Units Compact and light weight: The feature permits high performance and space-saving machine and equipment design. Easy & quick to mount: Eccentric locking collar and set screw ensure fast and positive locking of bearings to the shaft High sealing efficiency: Bearings are effectively sealed with end caps for added protection of dust and humid. Trademark: SZR Model No.: UP000/UFL000/KP000/KFL000 Company:Xinhengyi Bearing Co., Ltd