This is the 2 micron fuel filter that is a direct fit for all AirDog I, AirDog II, AirDog II-4G, and AirDog II-5G models.

Replacement Air Dog Fuel Filter.
•Filters up to 2 microns
•Fits AirDog 1 and AirDog 2
•Typical service interval 10-15K Miles
•Full manufacturer's warranty
Cross Reference Numbers: (Note, this is for fitment and not micron rating):

NAPA: 3420 (Standard Height)

NAPA: 3626 (Extended Height)

WIX: 33420 (Standard Height)

WIX: 33626 (Extended Height)

Baldwin: BF-7531 (Standard Height)

Fleetguard: FF5613 Stratapore Media (Standard Height)

Fleetguard: FF63051NN Nanonet Media (Extended Height)

Donaldson: P551315 Cellulos Media (Extended Height)

Donaldson: DBF5816 Donaldson Blue with Synteq XP Media (Extended Height)

LuberFiner: LFF3545 (Standard Height)