a)EN-74/BS1139. b)Size: for 48.3mm tube c)Weight: 0.63--0.64 kg d)galvanized or HDC Drop forged swivel coupler of British style's feature:1.Dimensions:48.3-48.3mm2.Meterial:Q235 carbon steel3.Nut:21mm,22mm,23mm4.T-bolt:80mm,89mm5.Weight :1.10-1.16kg or as per your request6.Standard:EN74,BS1139,CE and also fit for our demostic stardand , through SGS test.7.Technic:Forged8.Surface treatment:Self- ...