Grade : ASTM A aa 213 ASTM A aa 269 TP 304, 304L, 316,316L, 321, 347, 310 Size : 1/8'' ... NB to 24 NB Surface : Solution Annealed TP 304 304L 316 316L 321 347 310 stainless steel seamless ... surface ensure high performance and longer working life. Grade : ASTM A – 213 ASTM A – 269 TP 304, 304L, 316, 316L, 321, 347 ...