High-quality materials: Our unit bearings are made of high-quality zinc alloy material, which is strong and wear-resistant, and the zinc alloy flange base is of excellent quality and has a long service life. Easy to assemble: The pillow block set with ball bearing inserts can be installed immediately. The metal bearing kit is used for maintenance and replacement of 3D printer accessories. Adjustable angle: The zinc alloy bearing can be fixed between the inner bearing and the outer ring angle. Smooth operation, low friction and high rigidity. Easy to use: The hole bottom bracket is suitable for firmly attaching to the guide shaft, built-in pillow block, parts and accessories of 3D printers and other machines. It is very helpful to fix the drive shaft. Wide application: Insert pillow bearings with high-quality components can improve the efficient operation of 3D printers, can be used in various machines such as conveyor belts, mechanical equipment, mechanical manufacturing, etc., suitable for home and industrial use. Color: Silver Material: Zinc Size: 67 x 35 x 10mm Package Contents: 4 x Bearing Seats Only the above package contents, other products are not included. Note: Light and different monitors may cause the color of the item in the picture to be slightly different from the actual object. The measurement error is +/- 1-3cm.