The Power Products 3/16" Nylon Push-On Union is the perfect solution for tight fit applications under the dash. This union offers 60% better flow than standard compression fittings with inserts, making it ideal for air brake applications. It is approved for most air brake applications with the exception of frame to axle installation. This union is designed for use with air brake tubing, nylon, polyurethane and polyethylene tubing. When it comes to air brakes, you want a product that offers smooth flow and hassle-free installation. Look no further than this superior option that makes for the perfect choice. FleetPride is your First Click in Heavy Duty®.