GFHH-36S Americas # 1 Heavy Duty Grease Hose. Designed for Air Operated Guns. Working Pressure = 7,500 PSI. Burst Pressure = 28,000 PSI. Threads = 7/16"-27 Inlet / 1/8" NPT Outlet Hoses ends are heavy duty Zinc plated steel. Spring guard imparts rigidity to the hose end allowing convenience in fitment.