Description 8mm Flange Coupling Steel Rigid Flange Coupling Motor Guide Shaft Axis Bearing Fitting Specification Material SteelInner Hole Size about 8mmOuter Diameter about 16mm 32mmTotal Height about 13mmScrew Size M4Quantity 1pc Features 8mm Flange Coupling Rigid Flange Disc Shaft Couplings Optical Axis Support Fixed Seat Easy to install and replace Durable and insulation This seat could make your shaft more stable Package Included 1pc x 8mm Flange Coupling Notice 1 Please allow a bit error due to manual measurement please make sure you do not mind before you bid 2 The color may have different as the difference display pls understand More Details