Features:

• Fits: Trion Air Bear 229990-102, 255649-002, 255649-102, 229990-002, 349447-109, and 453000-001, Trion Air Bear Right-Angle 447380-002, Trion Air Bear Supreme (2000) 455602-001 and 455602-019, Trion Air Bear 2000, Air Bear Classic, Air Bear Plus 2000.
• Nominal size 20 x 25 x 5.
• Actual size (H) 19 5/8 x (W) 24 3/8 x (D) 4 3/4.
• Package contains 2 Filters.
• No assembly required...no combs needed...filter just slides right in!

Editor Reviews:

Product Description:
Air Bear has started rounding the dimensions on their 5 filters. These filters still fit the same, they just no longer contain fractions in the description. Pre-applied gasketing on the assembled filter prevents air by-pass. 98% efficient filtration media. High efficiency filter media collects small dust particles before they can collect on your coils. This product is listed and rated by Underwriters Laboratories as U.L. Class 2.

Rating : - It's a furnace filter.
It fits in my furnace. My furnace is happy. It is 25 degrees F outside, but my house is warm. My wife is happy. What more could one ask from such a product?