?Wide Compatibility?: Fully Compatible With Levoit Core P350 Pet Care Air Purifier (Part # Core P350-Rf). Note: The Name Of Brand And Model Is Only Used To Show Compatibility | | ???-????-?? Filtration?: Our Core P350 Replacement Filter For Levoit Adopts 3-Stage High Efficiency Filtration System, Ultra-Fine Nylon Pre-Filter, H13 Grade True Hepa Filter And Activated Carbon Filter To Effectively Improve Air Quality | | ?Top Performance?: The Core P350 Pet Care Replacement Filter Captures 99.97% Of Particles As Small As 0.3 Microns And Filters Airborne Smoke Particles And Odors. An Ideal Choice For Your Family With Pets, Smokers, And Poor Air Environment | | ?Value Pack?: Package Include 2 * Top Performance Filters To Keep You Stocked For Replacements. Each Filter Can Keep The Machine Working At Optimum Performance For 6-12 Months(Depending Upon Your Usage And Environment) | | ?Buy With Confidence?:At , We Are Dedicated To Ensuring A Positive Experience For All Of Our Cus.