For up to six full month, this replacement air filter from Tier1, comparable to the 255649-103 & 259112-103 filters from Trion / Air Bear, will capture up to 90% of all airborne particles 1 – 3 microns in size. An affordably priced two-pack, each filter helps to protect both your wallet and the planet through the use of recycled materials wherever possible in their make-up. Proudly made in the USA. Sized 20 x 20 x 5, MERV 11. Get the clean indoor air flow you deserve by ordering this two-pack of Tier1 replacement air filters, comparable to the 255649-103 & 259112-103 filters from Trion / Air Bear, from us online today.