Description NOTE: It is Steel No. 45, not stainless steel, it is a kind of iron, but it is harder than ordinary iron. Size description: The following coupling is 14mm in diameter and 22mm in length. 5-5, one side aperture 5mm, the other end aperture 5mm; (side hole M4 machine screw) Packing List: 1 x Steel No 45 Rigid Shaft Coupling – 5mm x 5mm


