Dual stage foam: Two different pore sizes create more trapping area for even the smallest dust particles
Flame laminated foam: both “stages” are not glued but heat sealed to provide maximum air flow
Reticulated foam: increase dirt-stopping surface area and increase foam strength
Strongest glue seams will withstand harsh solvents and gas (although we can’t understand why you’d want to use them) pull as hard as you can, foam will rip before the glued seam
Light color foam is easier to spot where the filter oil has covered the filter
Handmade
Every square inch of each filter is inspected for quality
One-year manufacturer’s warranty
Made in USA
Note: Products on this page may not be legal for sale or use in California or in other localities due to state and/or federal anti-tampering laws.
