Specification Brand : Tomotato BulletPoint1 : Axle Fixation -- This SBR linear rail collar is used for DIY CNC machine tools, ensuring accurate positioning and fixation of the axle. BulletPoint2 : Easy Installation -- The linear rail stop collars are designed to perfectly mesh with the axle, making them easy to install for convenient use. BulletPoint3 : Quality Material -- This shaft collar set is made from premium aluminum alloy material, lightweight, with excellent resistance. BulletPoint4 : Fine Performance -- With its robust construction and reliable fixing capabilities, the SBR linear collars provide long lasting performance, making it a reliable choice. BulletPoint5 : Service -- Welcome to contact with us before or after your purchase. Our warm & responsible customer service always be here for you. Color : Silver Tone ExternallyAssignedProductIdentifier : 7707654792604 ItemName : Tomotato 4Pcs Linear Rail Stop Collars, Aluminum Alloy CNC Limit Fixing Rings Anti Collision Block Stopper ID 16mm OD 35mm ItemPackageDimensions_Height : 1.5 centimeters ItemPackageDimensions_Length : 14 centimeters ItemPackageDimensions_Width : 10 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : setscrew-shaft-collars Manufacturer : Tomotato NumberOfBoxes : 1 PartNumber : Tomotatovtzfe315a4 ProductDescription : Specification: Item Type: Linear Rail Stop Collars Material: Aluminum Alloy Inner Diameter: Approx. 16mm / 0.63in Outer Diameter: Approx. 35mm / 1.38in Thickness: Approx. 10mm / 0.39in Screw Hole: M4