Being the world's leader in leak free technologies Parker PTC fitting is a composite push-to-connect air brake fitting that meets SAE and D.O.T. Specifications. Engineered to meet the demands of all truck/trailer, mobile and rail systems worldwide Parker PTC fittings reduce assembly time versus compression style fittings by 90 percent. The composite body is strong, lightweight and impact resistance. The innovative collet design ensures positive grip on the tubing and the rigid stainless steel tube support stays in place for ease of proper assembly. Manufactured by Parker, made in United States.