... : 9kg/m, 12kg/m,15kg/m, 18kg/m, 22kg/m, 24kg/m, 30kg/m Unit Weight: 8.94kg/m, 12.2kg/m, 15.2kg/m, 18.06kg/m, 22.3kg/m, 24.46kg/m ... , 30.1kg/m ... of rails: 38kg/m, 43kg/m, 50kg/m, 60kg/m, 75kg/mUnit Weight: 38.733kg/m, 44.653kg/m, 51.514kg/m, 60.643kg/m, 74.414kg/mLength ...