This HEPA filter is for the Winix P450 Freshome air purifier unit. It is also known as filter size 25. This HEPA filter lasts approximately 12 months depending on how often it is used and the environment in which it is used.
Approximate Size: 16-1/8 x 18-13/16 x 1
Note: This listing is for one (1) Winix 113250 Compatible HEPA filter by Magnet by FiltersUSA.