Glasfloss Industries ABP16253M112PK Z-Line Series 300 AB MERV 11 Air Cleaner Replacement Filter Option, 2-Case Replacement option for Trion Air Cub MERV 11 Performance Made in the USA Heavy Duty Moisture-Resistant Construction Pre-Applied Gasket Helps Prevent Air By-pass. (Air Cub is a registered trademark of Trion Inc.)