Quantity: 2 pieces High-quality material: The bearing seat is made of high-quality zinc alloy, strong and wear-resistant, and the bottom of the zinc alloy flange is of high quality and long life. Vertical Housing Set: Housing bearings are available in 4 different bore diameters, 8mm, 10mm, 12mm and 20mm. They perfectly meet your needs. Please make sure you need the correct size before purchasing. Easy to install and use: Adjust the screw clamp ring to make it firmly connected to the guide shaft. Two-hole spacers with ball bearing inserts are integrated pillowcase bearings, ready-to-install parts and accessories for 3D printers and other machines. Very useful for fixing drive shafts. Adjustable angle: The tightening ring of the adjusting screw can be firmly fixed on the guide shaft, and the fine adjustment can fix the angle of the bushings interior and exterior of the bearing, so as to achieve smooth, low-friction and robust operation. Wide range of applications: applied bearings with bearings are used in many machines such as machines and systems Good quality product