Item: Butt Welded Tee,Butt Welded Cross Specification: NPS1/2''-NPS48'' Material: ASTM A234, 304,304L,316,316L,321, A403, A420, A106, A312, A335, A515 ect. Standard: ANSI B16.9,MSS SP43,DIN 2616 ect.