... have our own factory 4.Carbon steel ProductElbow ;Pipe elbow;Pressing elbow,welding 90 degree elbowSize25-600mmMaterialCarbon stee(l20#,20G,16Mn,16MnR,106B ... ,St45.8)Type 90°elbow Wall thicknesssch20;sch30;sch40,STD,schSGP.sch80,sch160StandardANSI,ASME, ... customer's design and samples by different materialsCould be combined with other items in one order.