Specification:
Aluminum alloy is light, the top screw is 90 degrees design; 45# steel hardness is high, the top screw is 180 degrees design. If you want to aluminum coupler ,please buy Aluminum Coupling
Material: 45# steel,hardened by heat treatment, and then electroplated
Inner Diameter:3mm,3.17mm,4mm,5mm,6mm,6.35mm
Cylindrical Diameter: 10mm; Cylinder Height: 10mm; Overall Height: 12mm; Fixed Hole Screw:M3
Fixed Hole Distance:16mm
Inner Diameter:7mm,8mm,10mm,11mm,12mm
Cylindrical Diameter: 16mm; Cylinder Height: 10mm; Overall Height: 13mm; Fixed Hole Screw:M4
Fixed Hole Distance:26mm(11mm/12mm/14mm);24mm(others)
Inner Diameter:14mm
Cylindrical Diameter: 18mm; Cylinder Height: 10mm; Overall Height: 13mm; Fixed Hole Screw:M4
Fixed Hole Distance:26mm
Package Included:
Coupler x 1
Spanner x 1
Screw x 2