90° Clamp elbows are sanitary fittings for handle corners and bends in assembled beer hose systems. Sanitary elbow fittings are constructed of 304 SS or 316 SS stainless steel and meet 3A standards. 3A Sanitary Standards have been developed for a variety of equipment. The founding organizations of 3A represent equipment manufacturers, processors, and regulatory officials. 3-A Sanitary Standards may also be required under many state and local regulations.