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 : 507630 XC11688C CF11430 CF1278 AFC1685 PC99011C C48187C WP10130, Kit Includes: 6x Cabin Air Filter, Kit Variations: K54-100139 K54-100280 K54-100309 K54-100430 K54-100844 K54-101003 K54-101162 K54-101321 K54-101480 K54-101639, Part Reference Numbers : 507630 XC11688C CF11430 CF1278 AFC1685 PC99011C C48187C WP10130