<h3>Key features</h3><ul> <li>Size and PackingSBR20UU Bore Diamter (ID): 20mm, Outer Diameter (OD): 48mm, Total Length (L): 50mm. Package include 2 PCS bearings</li> <li>Material Made of bearing steel material,Static load rating of 1370/C0 N and dynamic load rating of 882/CN, Double Side Rubber Seal Linear Motion Ball Bearing Bushing, Double Side Rubber Seal</li> <li>High Precision5 lines steel ball is in point contact with the shaft and rotates with very little frictional resistance, so as to obtain smooth movement with high precision.</li> <li>Performance Smooth moving, low friction, low noise, high rigidity and long life. Economical, easy to maintain replace.</li> <li>Application Suitalbe for kinds of electronic equipment/guide bar, and pillar, 3D printers and CNC machines.</li> </ul><p>Free shipping included. 30-day hassle-free returns.</p>