Nispira True Hepa Activated Carbon Filter Set for Air400 Bissell Air Purifier 2520 and 2521 Item Package Quantity:2 A premium humidifier wick filter

A premium humidifier wick filter designed by Nispira compared to Holmes part HWF64

Suggest to replace every 3 - 6 months

This in-line humidification filter is compatible with standard CPAP and BiPAP machines and masks

dust and debris and smoke particles

10500 series

Nispira True Hepa Activated Carbon Filter Set for Air400 Bissell Air Purifier 2520 and 2521 Item Package Quantity:2 A premium humidifier wick filterNispira True HEPA filter with preliminary filter and activated carbon filter compatible with Air Purifier Air400 Compared to original part 2520 carbon filter and 2521 true HEPA filter Preliminary Filter to trap hair and pet dander. High quality HEPA filter capture 99. 97% of airborne particles down to 0. 3 microns. Activated carbon filter captures household odor and chemical VOCs Dimension: 1. 3" x 13. 7" x 16. 06". Suggest replacing the filter set