AFB Bronze MERV 6 13x21x1 (Actual Size) Pleated AC Furnace Air Filter. Pack of 2 Filters. 100% produced in the USA. 13x21x1 pleated ac furnace air filters. Perfect for home or business use. Each purchase is for a pack of 2 filters that can replace any standand furnace or air conditioning filter. Note the actual dimensions of this filter are 13x21x0.75". Note this is a custom filter, cut down from a larger filter, made to order by AFB in the USA. MERV rating of 6. Basic pleat that filters pollen, mold, and dust. AFB is a leading manufacturer of air filters, made in a US factory using 100% US components and shipped direct to your door. AirFilterBuy: Breathe Better!