... couplers 1. British, Germany, Italian, Australian, Japanese style.... 2. forged or pressed 3. Q235 British type pressed and forged double coupler ... hot dip galvanized. 4. British type drop forged double coupler weight: 1.05kg,British type pressed double coupler weight: 0.82kg ... standard couplers, Germany, American, Brazilian style couplers.....etc British type drop forged 48.3mm diameter double coupler