[4mm-7mm]

Couplings
D14L25 Aluminum Alloy Coupling Bore 3/4/5/6/6.35/7/8/10mm 3D Print Part Blue Shaft Coupler Screw Stepper Motor Connector 1Pcs
Package include:Coupling*1+ machine screw*4+wrench*1(Only one wrench is delivered per order.)
Size description:
A diameter of 14MM * length of 25MM, the color is dark blue, aqua blue.
A diameter of 16MM * length of 25MM, the color is blue