... , 19mm, 21mm, 22mm, 23mmCertificationISO9001:2000, CE, SGSBritish Type Scaffolding Single Coupler with EN74/BS1139 :1) Material: Q235 ... ,2) Processing method: drop forged3) surface treatment: zinc plated, hot dip galvanised.4) Unit weight: 1.50kg ... kinds of scaffolding couplers, includes German type, American type, Australian Type, Japanese type, Korean type, British type, and so on. All the ...