Features: Made of heat treated hardened steel, nickel plated finish for rust and erosion resistance. Allows for quick connection/disconnection of tools and airlines. Reduces accidental disconnection of airlines. Spring-loaded quick release couplers for use on the compressor side have a built-in valve to shut off the air when changing between tools. When using the coupler(s), slide the sleeve back, push in the connector, then fully slide the sleeve to lock the connector. Specifications :Quick Release Thread Type: 1/4'' BSP Material: Iron with Nickel Plated Connector Model: EURO Color: Silver Temperature Resistance: -20 ~ 107 deg; Withstand voltage: 150MPa Packing list: 4 x 1/4"" BSP female thread 4 x 1/4"" BSP male thread 1 x 1/4"" BSP fitting with female thread 1 x 1/4"" BSP fitting with male thread Note: 1. Due to various factors such as brightness of your monitor and lighting brightness, the actual color of the item may be slightly different from the images shown on the website.2. Please allow slight manual measurement deviations in the data.