Supplied by OmniSwivel International, this adapter has the 3/8-inch male fitting that connects to the female LP port found on first stages and the 9/16-inch male fitting that connects to the LP female fitting found on second stages. Install this in a 3/8-inch female port on a Y-block manifold or switch block for use with a standard low pressure regulator hoses or use it to convert an LP first stage port to an LP second stage fitting.