LR 90 Degree Aluminum Elbow size 1/2‘’-24‘’ Type Seamless Elbow and Welded Elbow Technique Push, press,cast,forged Marks on the product surface Name, material, size,heat no, type(smls or weld), standard, sch degree or WT Mark technical laser printing or painted wall thickness Sch40 and more thicker WT and Din, GB and Gost wall thickness Standard Ansi B 16.9, ASTM B 241, DIN 2605 and so on Material ...