we can supply all kinds of rails: BS11: 1985 StandardSizeDimension(mm)Weight(kg/m)MaterialLength(m)Head A(mm)Height B(mm)Base C(mm)Web D(mm)50 O52.39100.01100.0110.3224.83355Q6-1260A57.15114.3109.5411.1130.61855Q6-1260R57.15114.3109.5411.1129.82255Q6-1270A60.32123.82111.1212.334.80775A61.91128.59114.312.737.455U71Mn12-2575R61.91128.59122.2413.137.041U71Mn12-2580A63.5133.35117.4713.139.761U71Mn12-2580R63.5133.3512713.4939.674U71Mn12-2590A66.67142.8812713.8945.099U71Mn12-25100A69.85152.4133.3515.0850.182U71Mn12-25113A69.85158.75139.72056.398U71Mn12-25