Master Elite Series 12 Piece Set of Industrial I/M Type Plug Air Fittings with 1/4" NPT Male Threads. These professional coupler plugs are compatible and interchangeable with most brands of industrial I/M type and universal type quick-connect coupler fittings. Premium-quality blue anodized coupler plugs that are made with high-quality aluminum to ensure durability and long-lasting performance. These aluminum fittings are much lighter in weight when compared to the weight of standard stainless steel and brass fittings. These strong plugs securely lock into quick couplers enabling a reliable connection that can withstand air-powered tools and equipment's high pressures without leaking. Max. pressure 300 psi. Versatile coupler plugs that are ideal for multiple applications, including auto repair shops, body shops, construction job sites, and homes and garages. Attach the fittings to air hoses, air compressors, and pneumatic air tools like sanders, grinders, nail guns, spray guns, impact wrenches, inflation accessories, and more. Additional sets of just couplers and just plugs are available for separate purchases. Buy with Confidence: Backed by a trusted brand dedicated to your satisfaction, we ensure a hassle-free experience every time. Master Elite Series 12 Piece Industrial I / M Type Plug Air Fittings Set with 1/4" NPT Male Threads - Attach to Quick-Connect Couplers, Hoses, Compressors, Pneumatic Air Tools, Spray Guns, Sanders