HD industrial grade - spun glass grille with nominal 1 or 2 inches depth filters made for furnace and central air unit protection in residential and light commercial applications
EZ flow - reliable disposable filters with metal media retainers also used for furnace and air unit protection
EZ flow II - a filter that features frame adhered media for non-metallic applications
Modified Pinch Frame with Notch - perfect for use in residential furnace systems constructed with a one-piece chipboard frame that enhances the filter's strength