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. 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 Air Compressor Brass Check Valve 1/2 NPT Size Female (Top Thread) X 3/4 NPT Size Male (Bottom Thread) with Standard 1/8 NPT-F Unloader Port