Products:Stainless steel lost wax casting screwed pipe fitting. Material:AISI(304,316), ASTMA351(CF8M,CF8) Threads:AISI, B1.20.1, BS21, DIN2999/259&BSP&BSPT, NPT Pressure:150PSI Temperature: -60 ~ 450 F Size: 1/8"-4" PRICE of UNIONS F/F (USD FOB) size Price:(ss304) 1/8" 0.83 1/4" 1.07 3/8" 1.13 1/2" 1.60 3/4" 2.29 1" 3.26 11/4" 4.79 11/2" 6.06 2" 8.34 21/2" 12.55 3" 14.77 4" 18.56 THE PRICE WILL BE HIGHER IF TYPE SS316