4Pcs 6mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors. Widely use: used in model shaft connection, perfect accessories for RC Model motor Widely use: Used in model shaft connection, perfect accessories for RC Model motor. Function: Flange Shaft Coupling, suitable for model shaft connection, perfect accessories for RC Model motor, etc. Size:Inner Diameter: 6mm/0., 236 inch, Cylinder Outer Diameter:16mm/0., 63inch, Cylinder Height:10mm/0., 39inch,Base Height:3., 0mm/0., 118inch,Total Height:13mm/0., 51inch,Mounting Hole Distance: 24mm/0., 94inch,Base Diameter:31mm/1., 22inch. Aluminium Alloy Motor Coupler 4Pcs 6mm Aluminium Alloy Flange Coupling Connector, Rigid Guide Model Coupler Accessory Shaft Axis Fittings For Diy Rc Model Motors Flange Shaft Coupler Designed for precise shaft alignment in RC models, it includes all necessary screws and a mini hex wrench for quick, secure installation-ideal for professional... A special coupler, which can fix one shaft to a plane and install other parts on the shaft easily. Robot Replacement A special coupler, which can fix one shaft to a plane and install other parts on the shaft easily. Flange Coupling Connector, 6mm Aluminum Alloy Guide Double connection points fasten the coupler tightly.