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 : 90217p XC25864 CF10550 CF1193 AFC1476 PC5864 C25864 49352 WP10233, Kit Includes: 7x Cabin Air Filter, Kit Variations: K54-100037 K54-100178 K54-100392 K54-100513 K54-100641 K54-100798 K54-100957 K54-101116 K54-101434 K54-101593, Part Reference Numbers : 90217p XC25864 CF10550 CF1193 AFC1476 PC5864 C25864 49352 WP10233