The Power Products 1/4" Brass Frame Nipple is the perfect solution for air brake tubing and other air brake applications. It is DOT approved and marked and offers superior flow compared to conventional compression fittings with inserts. It is fast syncing and cutting off and is ideal for applications that must fit snugly beneath the dash. This product is made of high-quality brass and is designed to last. It is the perfect choice for any air brake application. FleetPride is your First Click in Heavy Duty®.