Tuff Jug Flexible Fuel Spout With Auto StopA Tuff Jug exclusive, the Flexible Fuel Spout with Auto-Stop is internally vented to provide both fast flow and auto shutoff, all-in-one. The internal venting system removes the need for external jug vents that can break or allow fluids to spill out the side of your container during transport or fueling. Save time, headaches and spilled fuel with Tuff Jug. An excellent choice for faster fuel fill-ups.Features: Internally vented fuel spoutprovides both fast flow and auto shut-off Only compatible with specified jug size Revised, 1" diameter fuel tube for faster flow Clear spout tube for improved viewing Removes the need for external jug vents that can break or allow fluids to spill Proprietary shape and length sized for5 US gallon (20 liter / 5.3 gallon) or 2.5 US gallon (10 liter / 2.7 gallon) Tuff Jug fuel containers Jug not included Fully rebuildable Requires 1" NPT adapter or Tuff Jug "Standard" Cap with 1" receiver (sold separately) Note:Spouts are only compatible with the internally-vented 3rd Generation (no external vent tab near handle) of Tuff Jug fuel containers.The Flexible Fuel Spout with Auto-Stop is only compatible with Tuff Jug products. Spouts are sized according to jug capacity and are not cross compatible.