Product details:

Fast and Easy Upgrade for Improved Filter Performance. This kit includes: one new, high-performance 213 filter (genuine Aprilaire filter); and the easy-install system frame: two rails, four uprights, and a door seal. It takes just 30 seconds to snap together. QUICK INSTALL GUIDE: 1)Remove that clunky old filter from your furnace. 2)Slide in the new frame. 3)Slide the new 213 filter onto the rails. (No more pleat spacers!) This upgraded kit is easy to use and provides better filter performance. So ditch the old 201 filter and experience easy maintenance and improved air quality with the genuine Aprilaire 213 filter.