Hexagonal Coupling Connector Material:
quality brass, well wear resistance. sturdy and durable, you can use them for a long time.

Size:
the cylindrical inner diameter is 4 mm， the total height is 18 mm, Please see the picture for other specific size .

Package Include:
6pcs High precision Flexible Coupling Connector,2 x Allen Wrench,12x Screws easy for you to assemble motors，a toy car or a robot

Wide application:
hexagonal flexible couplers are widely used to connect motor shafts and hex wheels, shaft coupling for DC motor car tire motor connection they are commonly used in robots, toy cars, etc.

If you need a synchronous motor that matches the coupling, please search for CHANCS, we will provide you with high-quality motor products and professional services.