Specification Brand : Sinoblu BulletPoint1 : Used for shaft fixing and positioning, Linear motion stopper and fixing the drill bit. Suitable for gearbox assemblies, motor bases, machine tools, drive shafts, agricultural implements, medical equipment, and paper and steel mill equipment, the automotive industry, the manufacturing industry, the hobby craft industry and many more. BulletPoint2 : Design fully engages the shaft without marring. Easily installed where major disassembly would otherwise be required BulletPoint3 : High quality aluminum alloy material, lightweight, surface oxidation resistant and corrosion resistant, durable and strong. BulletPoint4 : The shaft can be clamped-on tightly by set screw, the shaft will not be damaged BulletPoint5 : Package : 4Pcs clamp-on shaft collars Color : Silver CustomerPackageType : Standard Packaging ExteriorFinish : Black Oxide ExternallyAssignedProductIdentifier1 : 044861226018 ExternallyAssignedProductIdentifier2 : 0044861226018 ExternallyAssignedProductIdentifier3 : 00044861226018 ExternallyAssignedProductIdentifier4 : 0359627314077 ExternallyAssignedProductIdentifier5 : 00044861282366 FinishType : Black Oxide,Black Oxide Plating ItemName : Sinoblu 4pcs Shaft Collar Aluminum Stop Collar, 13mm Bore Size, 30mm OD, with M4 Set Screw, 10mm Thickness (Pack of 4) ItemPackageDimensions_Height : 6.4 centimeters ItemPackageDimensions_Length : 1.2 centimeters ItemPackageDimensions_Width : 6.3 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : clamp-on-shaft-collars Manufacturer : Sinoblu Material : Aluminum MeasurementSystem : English ModelNumber : 2C-100-S NumberOfItems : 4 OperationMode : Mechanical PartNumber : 4SCS13-1330-10 ProductDescription : One-piece Split Clamp-On Shaft Collar with Set Screw Bore Diameter: 13mm Outside Diameter: 30mm Height(Thickness): 10mm