ITEM NAME:5-8mm Aluminum Flexible Shaft Coupling Rigid Coupler Motor Connector D2E6 5-8mm Aluminum Flexible Shaft Coupling Rigid Coupler Motor Connector D2E6 Material: Aluminum Alloy Diameter*Length: 14*25mm color is Dark Blue Screw Hole diameter: 4mm Up and down Hole diameter: 5-8mm Package included: 1x Coupler 1x spanner 4x Screw Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.