Specification Brand : Aopin BulletPoint1 : [High quality medium carbon steel] This universal joint is made of high-quality alloy steel metal material, with a long service life and durability. BulletPoint2 : [Application Scenario] This universal joint coupling joint is widely used for connecting machinery, 3D printers, model cars, model ships, robots, and more. BulletPoint3 : [Working principle] The connection between shafts, the connection between power shaft and driven shaft, realizes torque and torque transmission, universal joint structure, and achieves rigid transmission with concentric or joint connection axes tilted to each other. BulletPoint4 : 【 Connection Screws 】 Comes with 4 connection fastening screws to help tighten the joint and achieve better rated torque and protection. BulletPoint5 : 【 Surface treatment 】 Adopting environmentally friendly blackening treatment process, the appearance is rust proof and aesthetically pleasing. Color : One Color ExternallyAssignedProductIdentifier : 7845557296994 ExternallyAssignedProductIdentifier1 : 0605129149885 ExternallyAssignedProductIdentifier2 : 605129149885 IncludedComponents : No ItemName : 1 Pcs 12X24X51mm Universal Joint Steering Black Shaft Coupling, The Motor is Connected to The Main Shaft to Transmit Torque ItemPackageDimensions_Height : 20 millimeters ItemPackageDimensions_Length : 48 millimeters ItemPackageDimensions_Width : 20 millimeters ItemPackageQuantity : 1 ItemTypeKeyword : pin-and-block-universal-joints Manufacturer : Aopin-Hardware Material : Alloy Steel ModelName : Hilitandpq4u3wgs5i ModelNumber : Hilitandpq4u3wgs5i NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : OP0 ProductDescription : Specifications: Material: Alloy steel Allowed Moment of Force: 45N.M Outer Diameter 20mm Inner Diameter 10mm