The X-tra Seal Female D Type Steel Coupler minimizes air leaks and ensures your air tools work at their best. This coupler is made of steel and features a 1/4" series industrial-style coupler inlet size with a maximum operating range of 250 psi. The yellow color makes it easy to identify and the steel construction ensures durability and long-lasting performance. This coupler is perfect for any air tool application and is sure to provide reliable performance. FleetPride is your First Click in Heavy Duty®.