Flanders Cut-to-Fit Kwik Kut 24x36x1 Permaire Filter Media (Qty: 12) Flanders Cut-to-Fit Kwik Kut Permaire Filter Media Description. Service Roll air filtration media is manufactured in selected widths, prepared in roll lengths that make manageable roll sizes. In most cases, a single cut across the roll will produce a ready-to-install filter pad. All are typically used in room unit air conditioners.