High-quality materials: Our unit bearings are made of high-quality alloy materials, which are strong and wear-resistant, and the alloy flanges are of good quality and have a long service life. Easy to assemble: Pillow block set with ball bearing inserts for installation. Metal bearing kits are used to maintain and replace 3D printer accessories. Adjustable angle: The alloy bearing can be fixed between the inner bearing and the outer ring angle. Smooth operation, low friction and high rigidity. Easy: The bottom bracket of the hole is suitable for firmly attaching to the guide shaft, pillow block, parts and accessories of 3D printers and other machines. Very helpful for fixing the drive shaft. Wide application: Insert pillow bearings with high-quality components can improve the efficient operation of 3D printers and can be used in various machines such as conveyor belts, mechanical equipment, mechanical manufacturing, etc., suitable for home and industrial use. Color: Silver Material: Size: 100 x 55 x 20mm Package Contents: 4 x Bearing Seats Only the above package contents, other products are not included. Note: Light and different monitors may make the color of the item slightly different from the actual object. The measurement allowable error is +/- 1-3 cm. ",