We supply reduction for large quantity. Welcome to touch with us! Flexibility of coupling shaft removes strain between the motor and driving components. The shaft couplers are broadly applied to small CNC machines encoding and 3-D printers Z shaft coupling, simplifies the debugging difficulty. 6mm to 8mm shaft usage diameter, 25mm length, 18mm diameter, set screw type, beam coupling.Zero backlash. One-piece metal spring coupling. For little torque shaft connect.Absorption of parallel, angular misalignments and shaft end-play via spring action.Widely utilized in drive systems for encoders, instrumentation,lead screws, small pumps, feed rollers and wherever gentle to medium duty, torsionally flexible coupling is required. Material: Aluminum alloy Color: Silver Weight: 14g Package Content: 1 * Shaft coupling Only the above equipment content, different merchandise usually are not included. Note: Light capturing and different displays may cause the color of the thing in the photograph just a little assorted from the real thing. The size allowed error is +/- 1-3cm.