OEM Gooseneck to Blue Ox 5th wheel adapter.

A Capture Plate is a required component of the SuperGlide fifth wheel towing system. This plate is attached to your trailer's skid plate. When you're hooked up into your SuperGlide hitch and ready to tow, it isolates the rotation of your trailer's king pin in the hitch. Movement and rotation is then transferred to the automatic cam action of your SuperGlide hitch, moving it away from the cab along its rails to prevent the trailer from contacting the cab of your truck! The #331725 is used with Lippert's Helux pin boxes that are 13-3/16" wide.