10 Piece Male and Female Air Couplers Fittings 5 Piece female air couplers and 5 piece male air couplers, 1/4 Inch NPT Threads. Solid steel construction with brass finish for high corrosion resistance and longer using life. Welcome to i-Tools Store and easily find right air fittings here. i-Tools are easy to use and made with precision craftsmanship. At store, believe our products, built for durability, built for reliability, built for work. Portable Size All the threads of coupler are the 1/4 inch NPT, 1/4 inch body size (basic flow size) which is most common size. All male and female coupers adapts to Industrial/M air plugs. Max working pressure of 300 psi. Unrivaled Quality Body of coupler is made of scratch-resistant steel, durable brass-plated and custom steel sleeve design to last longer. With 4 locking steel balls for increased life and holding power. The design of knurled sleeve gives a better grip when connecting and disconnecting these fittings. Sleeve guard helps reduce the risk of accidental disconnects and protects the coupler sleeve. Easy Operation Four locking balls in the coupler which hold the plug securely, insert plug into coupler when pulling sleeve back. Automatic the plug is separated from all couplers when pulling sleeve back. Worry-Free Warranty For any reason you are not satisfied, you have a full year to return the item for refund or replacement. FREE 100 Percent SATISFACTION : 1 Years Warranty Provided by i-Tools, So Click Add to Cart with Confidence.