20 1/2" x 23 1/2" x 1" MERV 6 - Premium Fiberglass Air Filter - 6 Pack MERV 6 - Fiberglass Air Filter:20 1/2" x 23 1/2" x 1" MERV 6 - Fiberglass Air Filter 20" x 20" x 12"

20" x 20" x 12" 95% No Header Rigid Filter

to protect occupants from airborne irritants and should be changed every 60-90 days depending on levels of air contaminents

20" x 25" x 4" MERV 11 - Pleated Air Filter - 6 Pack

17 1/4" x 21" x 1" MERV 11 - Pleated Air Filter - 6 Pack

18 1/2" x 20 1/2" x 1" MERV 13 - Pleated Air Filter - 6 Pack

20 1/2" x 23 1/2" x 1" MERV 6 - Premium Fiberglass Air Filter - 6 Pack MERV 6 - Fiberglass Air Filter:20 1/2" x 23 1/2" x 1" MERV 6 - Fiberglass Air Filter 20" x 20" x 12"20 1 2" x 23 1 2" x 1" MERV 6 Fiberglass Air Filter 6 Pack Actual Dimensions: 20 1 2" x 23 1 2" x 3 4" This filter is constructed using a MERV 6, fiberglass media with a downstream scrim and encased in the same partially recycled cardboard frame as pleated air filters. Unlike disposable filters made with sharp metal, these will not cut your hands and feature a low pressure drop and high level of filtration. Each filter lasts up to 1 month and should