TwinAir - Fuel Filter for Filling Gas, fits KTM 690 Enduro & Husqvarna 701 EnduroYoud be amazed at the dirt and debris that can work its way into your gas can and from there, into your fuel tank. Twin Airs monofilament screen pocket inserts in your tank to catch particles as small as 40 microns (. 00165) while allowing the gas to flow freely. The flange is custom sized for each modern 4 stroke model to ensure a leak proof seal. Just remove the filter periodically, turn it inside out, and clean out the debris that COULD have been