FilterBuy 20x20x5 Trion Air Bear Aftermarket Replacement Furnace Filter/Air Filter - AFB Platinum MERV 13 (2 Pack) 20x20x5 Trion Air Bear Replacement Furnace Filter / Air Filter - AFB Platinum MERV 13 (2 Pack) Top of the line MERV 13 replacement filter manufactured in the USA by AFB. Has pre-applied gasketing for tight seal and designed to last 6 months Removes bacteria, proplet nuceli (sneeze), lint & dust, dust mite debris as well as auto emmissions and large particles like milled flower. Best of breed MERV 13 replacement filter for Trion Air Bear Cub models 229990-103, 248713-103, 255649-103, Air Bear models 435790-001, 255149-003. AirFilterBuy: Breathe Better!