The Standard Surface Mount Fill Box Extension Kit is a must-have for any establishment that requires efficient gas delivery. With its flexible design, it can be installed in the ideal location for faster and easier gas delivery. This fill box combination is perfect for running the fill and vent lines along an outer building wall in any direction. The kit includes the extension, a Milcarb Standard Surface Mount Fill Box, a 1/2” 90° fitting, and four self-tapping mounting screws. Get your gas delivered right where you need it with this reliable and convenient kit.