Specification:Material: Aluminum Alloy
Length: 25mm
Outer Diameter: 14mm
Coupling Size: 5mm to 8mm
Widely used to couple stepper motor and lead screw for DIY CNC Router, Mini 3 Axis Engraving Machine, Wood Engraving Machine
Package Included:2 x Shaft Couplers
8 x Grub Screws
1 x Wrench