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 : 93951 XC10581C CF12283 CF1382 PC99238C C49187C WP10316, Kit Includes: 7x Cabin Air Filter, Kit Variations: K54-100101 K54-100242 K54-100289 K54-100410 K54-100648 K54-100722 K54-100881 K54-101040 K54-101358 K54-101517, Part Reference Numbers : 93951 XC10581C CF12283 CF1382 PC99238C C49187C WP10316