Product Description 5mm 8mm Aluminum Alloy Coupling Bore 3D Printer Parts Blue Flexible Shaft Coupler Screw Stepper Motor Flexible Shaft Coupler . Brand Name:KINGROONItem Type:Flexible Shaft CouplerModel Number:B0508 F1Material:Aluminium AlloyColor:BlueSize:5mm * 5mm / 5mm * 8mmLength:25mmDiameter:14mmSupport:Wholesale Retailpackage include:one piece Flexible Shaft Coupler |