This flange bolts to your fuel cell to permit attachment of a 1.5" I.D. filler hose. The fill tube comes off of the flange at a 90-degree angle, plus there is a laser-etched center mark which allows you to easily locate and attach a fuel level sending unit such as 91065082! These filler necks are manufactured from top-quality materials and are available in two sizes to best suit your application. You can count on these fuel cell filler necks to complete your performance fuel setup. 12 mounting holes on a 5.38" bolt circle. Includes mount ring, bolts, and gasket. Uses 1.5" I.D. filler hose. Laser-etched center mark for fuel level sender.