Aluminum Rigid Shaft Coupling Coupler Motor Connector for RC Model 3D Printer

1mm-12mm Aluminum Rigid Shaft Coupling Coupler Motor Connector for CNC RC Model. ●Blue Coupler：1pcs Coupler 4pcs Screws. ●Red Coupler：1pcs Coupler 1pcs wrench 4pcs Screws. ● Black Coupler：1pcs Coupler 4pcs Screws.

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