Radium Remote Mount Dry Break Filler - 1.5" - Female Fitting - VentedThe 20 0504 V Dry Break, 1. 5in, Female, Remote Mount, Vented typically secures to the vehicle body. The vented fuel cap has roll over protection if the vehicle ever becomes inverted. The fill neck has a machined hose barb connection for 1. 5" filler hose (available HERE). The components, materials, and seals are compatible with all fuel types (unleaded and leaded gasoline, diesel, AV gas, methanol, ethanol, E15, E85, etc.). The outer diameter is 4.