Aluminum Alloy Linear Ball Block UnitsLight-weight housing and Chromium Steel ball, good abrasion resistance, high precision and good strength moving, low friction, high rigidity and long working lifeSuitalbe for kinds of electronic equipment/guide bar, drive shaft, and pillar1.provides SBRUU series Linear Ball Block Units complementary to linear .2.They usually consist of a light-weight, Aluminum housing to high strength and stiffness.3.Compact design with High load carrying capacity, Linear Motion Unit is a rolling friction supporting that usually used for linear motion mechanical parts with small friction.4.Coordinate with Linear Motion Shaft, recirculating balls stroke at low friction movement, permit temperature within 80 degree Celsius.5.It is great for 3D printer, , and other applications.Product Name : Open Linear Model : SBR25UUShaft Diameter : 25mm/ 1 inch Product size: 65*45*60*57mmColor: SilverMaterial: Aluminum base alloy + steelPackage Contents:1 * Open linear Only the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.