POTAUTO MAP 1021C Heavy Active Carbon Car Cabin Air Filter Replacement for BUICK, CADILLAC, CHEVROLET, SAAB Spec.: 9.45" (Length), 7.99" (Width), 1.38" (Height); Four-layer fabric (One Carbon Layer) ; Installation instructions included. Applications Where Used: BUICK (Allure 2010, LaCrosse 15-10, Regal 15-11, Verano 15-12, Encore 15-13); CADILLAC (ELR Hybrid 15-14, SRX 15-10); CHEVROLET (Cruze 15-11, Malibu 15-13, Sonic 15-12, Spark 15-13, Volt 15-11, Orlando 14-12, Trax 15-13); SAAB (9-5 11-10, 9-4X 2011) (See Amazon Part Finder for fitments to your cars) Benefits: (1) Reducing at least 98% of these contaminants (Dust, Pollen, Exhaust Gas, Bacteria, Particles of 5-100 microns...etc.) from the air passing through the filter & entering the interior of the vehicle. (2) Activated carbon cabin filter provide extra protection by absorbing Adsorbing the airborne infectious agents & allergens, which aggravate respiratory diseases. (3) Increase safety through reduced deposits in the fan or on the windscreen, and protect HVAC air conditioning performance. Competitor Cross Reference Part Numbers (for reference only, please check size): AC-DELCO CF176, CHAMP CAF1872C, GENERAL MOTORS 13271190, 13271191, 52420930, HASTINGS AFC1457, KLEENER CAF1872C, LUBER-FINER CAF1872C, MANN & HUMMEL CUK2442, OPEL 13271191, 1808246, PRONTO PC-6154C, SERVICE CHAMP C36154, Ecogard XC36154C, WIX 24191, FRAM CF10775 Change filter every 12 months or 12, 000-15, 000 miles. Check & replace filter if peculiar smell / odors emit from the cabin air outlets, or if the vehicle HVAC system operates with poor performance, or humming, or weak air volume. LEGAL DISCLAIMER: The Brand name & Model # (if listed) are for cross reference only. All Brands, Trademarks & Model Numbers remain the property of their respective owners.