Type: copper coupling
Outer diameter: 9mm
Total length: 20mm
D1xD2: 

3.17mm-5mm
3.17mm-4mm
3.17mm-3mm
3mm-5mm
3mm-4mm
2mm-5mm
2mm-4mm
2mm-3mm
3.17mm-3.17mm
3.17mm-2mm
2.3mm-3mm
3mm-3mm
2mm-2mm
2mm-2.3mm
2.3mm-3.17mm
2.3mm-4mm
4mm-5mm
4mm-4mm
4mm-6mm
5mm-5mm
6mm-6mm
Material: copper
Diameter of Screw hole: 3mm
Package included:
5x coupling
10x screws