1.    Item:  en74 scaffolding forged double coupler

2.    Size: 48.3mm x 48.3mm(1 29/32" x1 29/32" )

3.    Material : carbon steel

4.    Standard : BS1139 (1982 & 1991), EN74 class A & B, AS1576

5.    Surface:  self-colored, galvanized, hot dip galvanized

6.    Nut size:  17mm, 19mm, 21mm, 22mm, 23mm

7.    Stype: British stype, American stype, Germany stype etc.