18x20x1 Key Pleat Purolator Air Filter - 8 (6 Pack)

Pleated filters prevent dust from entering your system while trapping airborne particles and allergens such as pet dander and dust mites. Mechanical 8 Filter. Air Flow Capacity listed at 300FPM; Low initial resistance for energy savings, Quality Engineered, Consistently Produced, Made of 100% synthetic fibers. Single piece beverage board die cut frame, with structural integrity unlike any self-supported filter available today. Pleats hold together even when wet! No delaminating, no excessive buckling, no collapsing. Filter can endure impact and deformation and return to its original shape.