The 400P-RV EF is an updated version of our popular 400P RV. It features VIAIR's new EF (Enhanced Flow) Technology that delivers up to 10% faster fill and 20% more performance, getting you back on the road faster than ever. EF compressors also feature an SAE power cord that allows you to use different power attachments for maximum versatility, an updated head for better heat dissipation and the same legendary VIAIR durability. The 400P-RV EF is compatible with dually tires, has 60ft of total hose reach and comes with a 40" twist-on chuck so you don't have to crouch while inflating your tires.