We are offering pipe fitting. stainless steel: astm a 182 grade: f 304, 304l, 304h, 316, 316l, 316ti, 310, 310s, 321, 321h, 317, 347, 347h carbon steel: astm a 105, a187, (ibr & non ibr) alloy steel: astm a 182, grade f1, f11, f22, f5, f9, f91 (ibr & non ibr) nickel alloys: monel 400 & 500, inconel 600 & 625, incolloy 800, 825, hastelloy 904 types : elbow, tee, union, cross, coupling, cap, bushing, plug, swage nipple, welding boss, hexagon nipple, barrel nipple, welding nipple, parraler nipple, street elbow, hexagon nut, hose nipple, bend, adapter, insert, weldolet, elbowlet, sockolet, thredolet, nipolet, letrolet, etc. Size : 1/8"nb to 4"nb (socketweld & threaded)