The Murphy PS-D (Pressure Seal) Radiator Fittings 15010202 allow the installation of L150/EL150K1 to the radiator when a fitting is not available. For diesel or oil, thick wall (to 1/4 in. [6 mm]), accepts 1/2 in. (13 mm) I.D. hose or 1/4 in. (6 mm) O.D. tubing.