3/4-16 x 1-1/16-12 Male O-Ring x Female O-Ring Reducer/ExpanderThe 3 4 16 x 1 1 16 12 Male O Ring x Female O Ring Reducer Expander is a precision engineered hydraulic fitting designed to transition between different O Ring Boss (ORB) thread sizes. This adapter enables the connection of a larger male ORB thread to a smaller female ORB thread ensuring a leak proof and high pressure resistant seal. Specification Details TYPE O Ring Reducer Expander DESIGN Straight adapter design for a simple and uninterrupted flow