... EN74/BS1139 :Type: Forged Single coupler Single coupler Scaffolding Single coupler Steel Single couplerSize: Single coupler Single ... 19mm, 21mm, 22mm, 23mmCertificationISO9001:2000, CE, SGSBritish Type Scaffolding Single Coupler with EN74/BS1139 :1) Material: Q235,2) ... coupler and pressed coupler. We have several kinds of scaffolding couplers, includes German type, American type, Australian Type ...