Material: stainless steel AISI316/304, ASTM A315 CF8M/CF8 Threads: ANSI B1.20.1(NPT),BS ZI,(PT,BSP) DIN:2999/259 Dimension: MSS-SP-114,ISO49-1983 Rating: 150PSI on pipe fittings; PN10 on compression unions Size: 1/8"-4" Temperature: -60 ~ 450 F Advantages : Produced from investment casting through in-house lost wax process foundry; PRICE FOR HALF COUPLING(USD ON FOB BASIS) size Price:(ss304) 1/8" 0.17 1/4" 0.18 3/8" 0.20 1/2" 0.34 3/4" 0.50 1" 0.74 11/4" 1.05 11/2" 1.28 2" 1.98 21/2" 2.86 3" 3.37 4" 5.18 IF QUANTITY GOOD, CAN BE LOWER 2%-5%. SS 316 IS HIGHER 10%