Trion Air Bear 16x25x3 Replacement Air Filter for Air Bear 229990-101 and 435790-028 Air Systems, GeneralAire 4521, Lennox X0581, Totaline P101-1625

The Aerostar 16x25x3 Replacement Air Filter for Trion AirBear 2299900-101 and 435790-028 Air Systems features a multi-system fit that is compatible with other brands and models (for full compatibility list, see Additional Specifications), and is available in multiple MERV ratings to suit your lifestyle and needs.