Specification Brand : Marhynchus BulletPoint : Bearings BulletPoint1 : [Multiple Bearings] The set includes 4 open-type blocks, providing you with all the bearings you need for different projects. BulletPoint2 : [Versatile Use] for 20mm shaft/rod applications such as 3d printers and engraving machines, ensuring high speed and precision. BulletPoint3 : [Precise ] With a 20mm inner diameter, 39mm outer diameter, and 11mm thickness, these bearings are ideal for various projects. BulletPoint4 : [ Material] These linear-motion bearings are crafted from premium aluminum alloy for durability and reduced noise levels. BulletPoint5 : [Long-lasting Performance] Enjoy a long service life with these high-speed, high-precision linear motion bearings made for quality results. Color : One Color ExternallyAssignedProductIdentifier : 8017268378323 IncludedComponents : No ItemName : 20mm Slide Bearing, 39mm Liner Motion Block, 4pcs Aluminum Alloy Open Type Bearing for 3D Printer, Engraving Machine ItemPackageDimensions_Height : 5 centimeters ItemPackageDimensions_Length : 20 centimeters ItemPackageDimensions_Width : 18 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : linear-ball-bearings Manufacturer : Marhynchus ModelNumber : Marhynchusxnf8z6qrbp NumberOfItems : 1 PartNumber : Marhynchusxnf8z6qrbp ProductDescription : Specifications: