“S” System compatible with most European breweries , also known as European Sankey. Keg tap has longer and more narrow probe than the D system keg coupler. This keg coupler is constructed of Chrome Plated Brass body with 304 Stainless Steel Probe. The included black pull handle is suitable for 1/6 small dia Kegs. This S system coupler is easy to use – simply pull out and down on the lever handle to tap a keg.