Premium Construction: Crafted from high-quality metal, these air hose fittings are engineered to resist rust, ensuring extended durability and reliable performance in various industrial environments. Optimal Compatibility: Featuring a universal 1/4 inch NPT thread and a 1/4 inch body size, these fittings are designed to be compatible with standard connectors. They can withstand a maximum working pressure of 300 PSI, making them suitable for a wide range of applications. Comprehensive Kit: This set includes essential components for your air systems: 1/4 inch NPT female coupler, 1/4 inch NPT male coupler, and both female and male 1/4 inch NPT plugs, providing you with the necessary parts to start or continue your projects without interruption. Versatile Use: These standardized fittings offer broad compatibility with various pneumatic tools and equipment, such as air compressors, blow guns, and air hoses, catering to the diverse needs of professionals and DIY enthusiasts alike. Secure Connection: Engineered with a 4-ball design, these fittings provide a robust connection that securely holds air tools and prevents air leakage, enhancing the efficiency and safety of your pneumatic systems. Color: As shown Material: Metal Package Contents: 1 set * air hose accessories Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement may vary by +/- 1-3 cm.