... :OD10-220*Thk 0.5-10xL 4.ASTM B161 B163 5.Eddy curret Ite NameNickel seamless tubeGrade of materialNi200,Ni201, Ni205, N4 ... ,N6UNS NO2200, UNS NO2201, UNS NO4400StandardASTM B161, ASTM B163Size (MM)OD6 ... (Korea), GNG Co., Ltd.(Korea), ZAN (Japan). GE ( USA) etc. ASTM B163 UNS NO 2200 Nickel Seamless Tube