... according to drawingsRaw material : Q235Surface: Plain (oiled) 3.Rail Clip/ Tension clampType: SKL1,SKL3,SKL12,SKL14Raw material:38Si7 , 60Si2CrASurface ... : Plain(Oiled) , Black paint, Color paint Zinc, HDG,etc. 4.E clip/Rail anchor/Fast clipType:e1609, e1809,e1817, e2055 ... 60Si2MnASurface:Plain(oil), Black paint, Color paint,Zinc,HDG,etc. 5.Clip bolt/T bolt/Rail bolt/ Clamp bolt/ ...