2-1/2 x 1-5/16 O-Ring Reducer/ExpanderThe 2 1 2 x 1 5 16 O Ring Reducer Expander is a hydraulic adapter fitting designed to either reduce or expand ORB connection sizes within a fluid system. It allows for the seamles transition between different ORB thread sizes while maintaining a secure, leak free connection using an O ring sealing mechanism. Reduces or expand ORB connection sizes allows flexible hydraulic system design. Specification Details TYPE O Ring Reducer Expander DESIGN