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 M/F (USD FOB) size Price:(ss304) 1/8" 0.92 1/4" 1.16 3/8" 1.34 1/2" 1.84 3/4" 2.42 1" 3.82 11/4" 5.42 11/2" 7.29 2" 9.70 21/2" 13.43 3" 17.12 4" 24.03 Price will be higher 10% if type 316