This listing is for a piece of filter media 20" x 30" x 1" thick (cut with scissors or razor knife to fit your size filter.) Included free is an H shaped support wire that is 30" x 10" that can be bent with a pair of pliers for extra support. (see pics above) Fits any opening 20" x 30" or smaller This is the filter media used in large commercial HVAC systems like colleges and public schools. This stuff is built to last. In commercial systems it is put into metal frames and then removed periodically to be washed. It has a semi rigid backing to hold it into place but we supply you with a metal wire support for an extra firm fit. You can easily get 5 or more years out of one of these filters. Simply remove when dirty and wash with the hose. Shake it dry and put it back! A/C filters are deliberately made to be thrown away every 30 days so that you buy more. We dont expect you to buy another one from us for 5 or more years! Please tell your friends about us because we still like to eat! * Holds 2x the dust compared to polyester filters * Low Airflow Resistance Saves Money * Effective against Dust, Lint, Dust Mite Debris, Pollen, Mold * Your cost is 50 cents per month on this 5 Year filter compare to 5$ per month for a disposable filter * The reason we get at least 5 years out of each filter is the metal support wire other washable filters loose there rigid shape after washing Use your old filter as a pattern to cut out your new filter Install so air flows through the fiber side and out the net side Free Shipping to all US States And Territories Free Shipping To All US States And Territories