Bore Rigid Coupling Set Screw Copper Motor Shaft Coupler Connector for 3D Printer DIY Robot Pack of 2 (Inner Aperture: 6mm - 8mm)

SpecifcationsMaterial: CopperHole tolerance: +0.02Color: CopperThe following 11 kinds of couplings have an outer diameter of 14mm and a length of 22mm: 01 4mm-4 mm(M4 machine screws are used for the side holes) 02 4mm-5 mm(M4 machine screws are used for the side holes)03 4mm-6 mm(M4 machine screws are used for the side holes) 04 5mm-5 mm(M4 machine screws are used for the side holes) 05 5mm-6 mm(M4 machine screws are used for the side holes) 06 5mm-8 mm(M4 machine screws are used for the side holes)07 6mm-6 mm(M4 machine screws are used for the side holes) 08 6mm-8 mm(M4 machine screws are used for the side holes) 09 8mm-8 mm(M4 machine screws are used for the side holes) 10 7mm-8 mm(M4 machine screws are used for the side holes)11 7mm-7 mm(M4 machine screws are used for the side holes)The following 4 types, the outer diameter of the coupling is 16mm, and the length is 22mm:12 5mm-10 mm(M4 machine screws are used for the side holes)13 6mm-10 mm(M4 machine screws are used for the side holes)14 8mm-10 mm(M4 machine screws are used for the side holes)15 10mm-10 mm(M4 machine screws are used for the side holes)The following two types, the outer diameter of the coupling is 20mm, and the length is 22mm:16 8mm-12 mm(M5 machine screws are used for the side holes)17 10mm-12 mm(M5 machine screws are used for the side holes)18 12mm-12 mm(M5 machine screws are used for the side holes)For example:"7mm-8mm" means:aperture at one end is 7mm, the other end is 8mmPackage Content2pcs Rigid Motor Coupling 1pcs Hex Head Spanner4pcs Screw