Standard:JIS,AISI,DIN,ASTM,BS,GB Grade:Q235 55Q U71Mn 75V 50Mn 45Mn Rail Heigth:69.85-185.74mm Bottom Wm Web Thickness:5.9-44mm Head W20mm Length:6-12m Type:Light Rail Application:GuWeight:8.42-118.1KG M Secondary Or Not:Non-secondary Bolt Hole Diameter:8mm-64mm