Barbed fittings are the go-to fitting for connecting directly to a hose or tube, snugly and securely. The Valved Flow path maintains a controlled disconnect of fluid and gas lines that are under pressure. Glass Filled Black Nylon is ideal for high-temperature applications and also incorporates high strength and rigidity. Silicone O-Rings are resistant to extreme environments and high temperatures. 302 Stainless Steel is a material that is corrosion resistant and is considered a general-purpose spring. Size 5 fittings are designed to accommodate tubing that measures 5/16" or 7.94mm (ID).