PREMIUM 304 STAINLESS STEEL PROBE: The bottom probe of the U-type beer coupler that connects to Sankey kegs is made of 304 stainless steel, which provides excellent corrosion and rust resistance and will not release harmless substances.The body of the Sankey U-coupler keg coupler is chrome-plated brass, which wears and shines well, making it fit for commercial environments such as taverns, bars and restaurants ANTI-LEAKAGE DESIGN: Built-in silicone check valve and beer gasket prevents liquid backflow and air contact, better preserving the taste of your beer.The Sankey d System keg connector comes with 2 stainless steel hose clamps that tighten the keg faucet hose/air hose, ensuring a secure connection and consistent, reliable pouring every time Standard G5/8 Thread: The Model D keg coupler utilizes the American Brewing Industry standard G5/8 thread with a liquid-tailed barb for 5/16 ID beer and gas lines.The G5/8 thread has been carefully cut to work with ball-locked keg fittings by means of a keg coupler adapter to help you dispense beer from your homebrew kegs with ease STABILIZED PRESSURE CONTROL: A simple pull on the pressure relief valve quickly releases excess pressure in the keg, preventing pressure buildup that can affect beer quality.When pressure reaches approximately 55 psi, the valve automatically activates to prevent overpressurization and ensure safe operation EASY TO INSTALL: The Sankey beer Coupler kit includes 1 red beer gasket and 2 hose clamps. Simply align the lug locks on the body of the Sankey U Keg Coupler with the lug housings on the top of the keg. Then, turn the sankey u keg coupler clockwise until it stops and finally push down on the keg tap handle until the beer coupler locks into place Size 0.3125 inches Brand WELLBOM Color Silver Material Stainless Steel Item Weight 4.8 ounces Thread Size 5/8 Thread Type NPS Manufacturer WELLBOM Connector Type Coupling Batteries Included No Batteries Required No Product Dimensions 6 x 4 x 1.5 inches Item dimensions L x W x H 6 x 4 x 1.5 inches