The X-tra Seal 1/4" NPT Female G Automotive Style Air Tool Coupler is designed to minimize air leaks and ensure your air tools work at their best. This coupler features a maximum operating range of 250 psi. It is made of durable steel and comes in a blue finish. This coupler is part of the 3/8" series automotive-style coupler. It is easy to install and will provide a secure connection for your air tools. FleetPride is your First Click in Heavy Duty®.