grn fil 3 + 4 pack hpa300 hepa filter replacement r compatible with honeywell air purifiers hpa300 hpa304 hpa3300 hpa5300 hpa8350 series, 3-pack with 4 carbon pre-filters, replaces hrf-r3 hrf-r2 hrf-r1 3 hepa + 4 a carbon filters is up for auction in Home & Kitchen. The current bid is $1.00, 95% below the $19.99 MSRP, in Good Condition. Bid on this item at our Strongsville - Drake Rd location before the auction closes.