Milton (209) 1/4" NPT Rubber Filler Spout Faucet Great for filling radiators and other containers NPT: 1/4" female national pipe threads MAXIMUM: Operating pressure range of 30 to 35 pounds per square inch MATERIAL: Stainless steel springs, zinc alloy body and nitrile rubber hose Made in USA Easy operation and smooth flow due to long flexible rubber spout with lever control Operating pressure: standard municipal (city) water pressure 20 to 35 PSI Nitrile rubber Zinc alloy body