Package Components: This 0.97lb air hose fitting set includes 2 I/M female couplers, 4 I/M male plugs, 4 I/M female plugs, 3 extension nipples, 2 rolls of seal tape, and 1 storage case. Designed for use with pneumatic tools and air compressors to enhance efficiency and extend service life. Premium Material: Made from high-quality brass, this set offers high hardness, wear resistance, and durability for frequent home use. With excellent corrosion and high-pressure resistance, it performs well in harsh environments like workshops, reducing the risk of rust or damage. High-Precision Fitting: Each coupler and plug features a 1/4-inch NPT thread for a precise fit. Used with seal tape, they ensure excellent sealing, preventing leaks and maintaining optimal airflow. Note: The maximum working pressure is 300 PSI. Convenient Operation: The set comes with a durable storage case for easy organization and an external hook for wall hanging, saving space and providing quick access. Two female couplers each feature 6 locking balls or quick, secure connections with a tight seal, ensuring stable airflow and improving work efficiency. Versatile Compatibility: This air hose fitting kit is ideal for job sites, auto repair shops, dealerships, and home garages. It fits hoses, air compressors, pneumatic tools, nail guns, air guns, and pressure washers, making it a one-stop solution for pneumatic tool connections. WORKPRO 16-Piece 1/4-Inch NPT Air Hose Fitting Kit with Storage Case, Quick Connect Brass Coupler & Plug for Air Compressor Accessories