Specification Brand : MOUMOUTEN BulletPoint1 : Size Specifications: The shaft coupling set contains 5 pcs of couplings, with the length of 22mm, the outer diameter of 14mm, the inner diameter of 5mm to 8mm and side aperture of 4mm. They can fit various sizes of shafts and motors. BulletPoint2 : Brass Material: The bore rigid couplings are made from premium brass material, wear-resistant, and heat-resistant. They increase the durability and performance of the couplings, and can last for a long time. BulletPoint3 : Anti Deformation: The edges of these couplings are clean, have been perfectly processed, and are not easy to deform under pressure. They have a high strength and rigidity, and can transmit and motion effectively. BulletPoint4 : Easy to Install: The shaft couplings come with additional set screws, which will save you the trouble of drilling additional holes and make it safer. You just need to tighten the screws to fix the couplings on the shafts and motors, without any tools or glue. BulletPoint5 : Wide Applications: The motor shaft connectors are widely used in motor, hardware, mold and mechanical transmission, such as model cars, model boats, model planes, etc. They are versatile and useful tools for DIY enthusiasts and professionals alike. Color : One Color Department : Unisex Adult DriveSystem : External Hex ExteriorFinish : Aluminum ExternallyAssignedProductIdentifier : 9463741945886 FinishType : Finish ItemName : MOUMOUTEN Shaft Coupling with Brass Material, Anti Deformation and Easy to Install, Motor Shaft Coupling Bore Rigid Coupling for Motor and Mechanical Transmission ItemPackageDimensions_Height : 8 centimeters ItemPackageDimensions_Length : 2.1 centimeters ItemPackageDimensions_Width : 5.6 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : set-screw-couplings Manufacturer : MOUMOUTEN Material : Aluminum MetalType : Aluminum ModelName : UAMOU ModelNumber : UAMOU NumberOfItems : 1 NumberOfPieces : 1 PartNumber : MOUMOUTENu4skmqgbg7 ProductDescription : Specification: