... coupler and pressed coupler. We have several kinds of scaffolding couplers, includes German type, American type, Australian Type, Japanese type, ... and best delivery,pls choose us.We produce high quality couplers, in both drop forged and punching procedure, in according ... surface can be electro galvanization or hot dip galvanization. Standard couplers are widely used with Ø48.3 steel scaffold tubes, we ...