Toyo Aluminum Ventilation Fan Filter, Easy-to-Apply, Rectifier Plate, Back Sheet, for Fans Behind Range Hood Covers, Prevents Dirt and Cleans Quickly

The front has a "rectifier plate," the back has a "sirocco fan cover," and the back has a "rectifier plate backing sheet." All three are perfect! Cleaning before application is a pain, but once you've cleaned it and started installing the filters, you can keep it looking clean by simply replacing them. It's important to install the filters when your home is clean, such as when you move into a new home or after a thorough cleaning. Use all three to keep it looking clean! Perfect for daily cleaning and thorough cleaning. Keep it clean every day with preventative cleaning!