APPLICATION: Suitable for use with hydraulic or pneumatic systems, interchangeability with other test point couplings manufactured to the same specifications. PREMIUM MATERIAL: Made of durable, industry proven CNC Billet Aluminum/steel, excellent solid with great rust and corrosion resistance for years of trouble-free use. FUNCTION: Flush face valves minimize air inclusion and spillage. EASY INSTALLATION: Easy push to connect operation. 100% SATISFACTION GUARANTEE: .