PUR exclusive enhanced HVAC filters up to 99.7% of dust, pollen and contaminants, PUR exclusive 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 : 479954 XC11814 CF11719 CF1333 TC21761 C21761 WP10124, Kit Includes: 10x Cabin Air Filter, Kit Variations: K54-100527 K54-100945 K54-101104 K54-101263 K54-101422 K54-101581 K54-101640 K54-101678 K54-101716 K54-101754, Part Reference Numbers : 479954 XC11814 CF11719 CF1333 TC21761 C21761 WP10124