The flange coupling is made of 45 steel (a kind of iron), hardened by heat treatment, and then plated.
Attention: This product does not include a wrench and needs to be purchased separately.
Product Description:
Name: Flange coupling
Material: 45 steel
Surface treatment: Electroplate
Size: 3mm , 3.17mm , 4mm , 5mm , 6mm , 6.35mm , 7mm , 8mm , 10mm , 11mm , 12mm
Package Include: 1pc x coupling