Enhanced Compatibility & Precision Fit：Compatible with Honeywell HPA5300B, HPA5350 & PowerPlus HPA3300 (Part # HRF-R3, HRFSC1, HRF-A300). Specially engineered for seamless installation—no measuring or tools required. Ensures a snug fit for efficient, quiet operation and optimal air purification. H13 True HEPA Filtration Excellence：Captures 99.97% of particles as small as 0.3 microns, including dust, pollen, smoke, and pet dander. Combined with activated carbon prefilters, it neutralizes VOCs, chemicals, and household odors, delivering fresh, purified air for your family’s health. Complete Value Packaging：Includes 3 True HEPA Filters, 3 Enhanced Filters (HRFSC1), and 4 Carbon Pre-Filters. Dimensions: HEPA (10.2”x6.5”x1.6”), Prefilter (14.2”x17.3”x0.2”). Perfect for long-term use, reducing frequent repurchase hassles. Smart Maintenance & Easy Replacement：Replace HEPA filters every 6-12 months and prefilters every 2-3 months. Tool-free installation and simple cleaning tips (gentle vacuuming/brushing monthly) ensure peak performance and extend your purifier’s lifespan. Premium Quality & Satisfaction Guaranteed：Crafted with top-tier materials for durability and efficiency. Backed by a customer satisfaction promise—enjoy hassle-free replacements and odor-free air within minutes. Note: Remove plastic wrap before installing new filters.