Attwood 6 Gallon Fuel Tank with Gauge EPA Certified multi-layer tank with industry leading fuel flow performance. Designed around the EPA and California Air Resources Board CARB regulations. Features an ergonomic design, a fuel gauge, and a tethered self sealing cap with audible click. Automatic Vacuum Valve ensures proper fuel flow and eliminates the need for manual vent and adjustment Low-permeation tank virtually eliminates fuel evaporation and fuel loss Compatible with 14 NPT fuel fittings E