Includes: housing, door, hinge, latch, gas cap, spout and install instructions. It can be installed in steel or fiberglass panels. This part is a 7" radius. Door is 3-1/2". The top is made of 18 gage mild steel. The spout is 2" o.d. and 3-3/4" long. Hinge is spring loaded to hold the door open and closed. Latch is spring loaded and magnetic. Part comes with spout, cap and pictured instructions.