You Can Get: 4pcs Bearing Block, 12mm Bore Ball Mounted Pillow Block Insert Bearing. Our pillow blocks are always your best choice. High Quality: Using high quality zinc alloy material, sturdy and wear resistant. Zinc alloy flange underside with excellent quality and long service life. Adjustable Angle: Fine adjustment can fix between inner bearing and outer ring angle. Smooth operation, low friction and high rigidity. Easy to Use: These set of 4 ball bearings by a two-hole housing with ball bearing insert for ready-to-mount installation. Ball bearing pillow block has screw fixing ring clamp for a firm holdon the guide shaft. Versatility: Bearing bearings are widely used in various machinery, such as conveyors, mechanical equipment, machinery manufacturing, 5D printers and other machinery etc.