1.name: pipe fittings stainless steel cross tee 2.material : carbon steel and stainless steel The cross tees comes in superior grades of steels.--Grades: ASTM A182 F304, 304L, 304H, 316, 316L, 317, 317L, 321, 310, 347, 904L, etc. --Size:1/8" NB TO 4" NB. (SOCKETWELD & THREADED) --Class:150#, 300#, 600#, 900#, 1500#, 2000#, 3000#, 6000#, 9000#