4pcs SBR20UU Open Linear Motion Bearing Sliding Block 3D Printer CNC Parts 20*39*11mm

Features: These linermotion bearings are made of high quality aluminum alloy for low noise and long service life. Bearings have a 20mm inner diameter, a 39mm outer diameter, and a 11mm thickness. These are great for 20mm shaftrod projects such as 3D printer, engraving machine. They are open type blocks, have high speed and high precision. There comes total 4 pieces bearings which you may use for many different projects. Specifications: Type: SBR20UU Material: Aluminum alloy Inner Diameter: 20mm0.8in Outer Diameter: 39mm1.5in Thickness: 11mm0.4in Quantity: 4pcs Package Includes: 4 x Linear Blocks .These linermotion bearings are made of high quality aluminum alloy for low noise and long service life. Bearings have a 20mm inner diameter, a 39mm outer diameter, and a 11mm thickness. These are great for 20mm shaftrod projects such as 3D printer, engraving machine. They are open type blocks, have high speed and high precision. There comes total 4 pieces bearings which you may use for many different projects.