Light Rail 8kg/m Standard:GB11264-89 Material:Q235,Q235B,50Q,55Q Weight:8.42kg/ ... : 37A 50N CR73 Material: U71Mn Length:according to clients' requirement5.English standard rail Size: BS50O,BS60A,BS60R,BS70A,BS75A,BS75R, BS80A,BS80R ... Material: U71Mn,700/900A Length:8-25m 6.South Africa standard rail Size: 15kg,22kg,30kg,40kg,48kg,57kg Material: 700 ...