Accessories and Parts -4-4mm RC Car Boat Motor Shaft Coupling Rigid Coupling Highlights Generic Brand 4-4mm RC Car Boat Motor Shaft Coupling Rigid Coupling Description: High precision , beautiful appearance, light weight and high strength. It is one of the good accessories for model making. Suitable for: connecting two axles with different diameters, can also be connected with a motor axle or connecting shafts with different diameters. Between the transmission can do the two screws can do remote control boat propeller shaft model and engine power. Widely used in automobile models, ship models, hardware, molds, mechanical transmission occasions. Material: metal The color red Size Chart: Size: approx. 12 x 12 x 20mm / 0.47 x 0.47 x 0.78inch Package Include: 5pcs Shaft Coupler 4pcs Screws 1pc Wrench Note: Please allow 1-3mm error due to differences. manual measurement. Color may be slightly different due to the color calibration of each monitor.