Nispira True HEPA Replacement Compatible with Therapure Air Purifier TPP440. Compared to Part TPP440F. 4 Filters

Premium HEPA filter replacement compatible with Therapure Air Purifier TPP440 TPP540 TPP640 It replaces Therapure part TPP440F black casing filter. (NOT TPP240 which is longer and slimmer) Pre-filter helps trap visible dust such as hair. Approximate Dimensions: 17.8 x 5.25 x 2.4 inches. 4 Filters included. Suggest to replace every 6 month to achieve optimal performance 100% customer satisfaction guaranteed. Quality meets or exceeds leading national brand