... 2.good bearing capacity EN74 British type scaffolding pressed double Coupler :Type: Pressed en74 coupler en74 coupler Scaffolding ... , 22mm, 23mmCertificationISO9001:2000, CE, SGSEN74 British type scaffolding pressed double Coupler :1) Material: Q2352) Surface: Zinc Plating, or ... surface can be electro galvanization or hot dip galvanization. Standard couplers are widely used with Ø48.3 steel scaffold ...