3/4" NPT M x 3/4" NPT F, with Double Tapped 1/8" NPT Ports (2 unloader ports) American made brass valve with removable clip for easy maintenance of inner valve. Machined C360 brass body. 302 stainless steel spring. 15% glass-filled teflon poppet. 1 PSI cracking pressure, maximum pressure: 500 PSI, maximum temperature: 450°F Thread seal applied or supplied for valves with NPT threads. 100% tested for backflow leakage Please note: NPT sized valve threads will not correspond to standard sizes. Please see our attached charts or message us with questions. 6 month no hassle warranty Sellerocity American Made Brass Air Compressor Check Valve 3/4" NPT Male x 3/4" NPT Female with Double Tapped 1/8" NPT Ports