Provides torque transmision and alignment.Cost effective coupling design.Stainless steel is good in corrosive environments.Specifications:Product Name: Universal JointSize: 52mm x 12mm/2.03 inch x 0.47inch (L*D)Bore Diameter: 6mm to 6mm(0.24inch to 0.24inch)Material: nickel-coated ironNet Weight: 87gThread Size:M3Main Color: Silver TonePackage Content:3 x Universal Joint