20x25x5 Merv 8 Air Bear Generic Replacement Filter Flat Rate Shipping (easy store pack) For 5" Filters including: Trion Air Bear Right-Angle, Trion Air Bear Supreme (2000), Trion Air Bear 2000, Air Bear Classic, Air Bear Plus 2000 and others Unique popup design. Filter comes 1/8" thick allowing easy storage of 6 filters or 3 year supply Nominal size 20 x 25 x 5 Actual size (H) 19 5/8 x (W) 24 3/8 x (D) 4 3/4 Special tackifer traps larger size particles like pollen, pet dander, mold, and dust