1/2"-14 FNPT x 1/2"-14 MNPT Durable Materials: Constructed from high-quality POM (Polyoxymethylene) and PP (Polypropylene), this fitting offers durability and resistance to corrosion, ensuring longevity in various environmental conditions. Compatible Brands: SHURFLO, SEAFLO, Kohree, Circle River, Johnson, Jabsco, FLOJET, Amarine, REMCO, Lippert, USA ADVENTURE and More 51F04 Fitting Suitable for SEAFLO 33/34/42/44/51/54 Series Diaphragm Pumps.