Designed to work with Shark Air Purifiers: HP102, HP102PET, HP102PETPR & HP102PK2 ANTI-ALLERGEN HEPA MULTI-FILTER: Shark’s NANOSEAL Filter with true HEPA captures 99.98% of large, small, & micro-sized particles (based on IEST-RP-CC007.3, 0.1–0.2 microns). HEIGHTENED ODOR PROTECTION: An advanced odor guard on the filter protects against household odors from cooking, cleaning products, and more. Replace filter every 6 to 12 months.