Coilhose Pneumatics PRM0404 Reusable Replacement Fitting For 1/4-Inch ID Hose, 1/4-Inch MPT Rigid Fitting body and nut for air hose Brass for resistance to corrosion Connection for hose with 1/4" ID and 3/8" OD on one end and a 1/4" male rigid NPT connection on the other end Maximum pressure rating of 300 psi Temperature range of -40 to +250 degrees F