PUR exclusive enhanced HVAC filters up to 99.7% of dust, pollen and contaminants, PUR exclusive activated carbon weaves are USA-engineered to last up to 15,000 miles, 25% longer than standard performance of 12,000 miles, PUR filter use thick, industrial strength electrostatic media to trap even the tiniest of particles while densely packed activated carbon prevents gases and odours from entering the cabin, Road debris, exhaust fumes, and contaminants undergo filtration through a three-layer system, which includes a dust filter for trapping road debris, a particle-averting filter to block airborne particles, and an adsorption filter for absorbing exhaus, Contains soda combined with carbon cleans the outside air flowing through the ventilation system, Part Reference Numbers : 97439C CT41816C C41816C WP10654, Kit Includes: 10x Cabin Air Filter, Kit Variations: K54-100574 K54-100974 K54-101133 K54-101292 K54-101451 K54-101610 K54-101674 K54-101712 K54-101750 K54-101788, Part Reference Numbers : 97439C XC11708C CF1425 CT41816C C41816C WP10654