21 x 27 x 5 MERV 11 Space Baron Replacement Filter for the Trane Perfect Fit BAYFTFR21M Air Cleaner System. Sold in a package of 2 filters.Proper filtration is the first step to creating a Healthy Living Environment. Space Baron replacement filters are manufactured to provide the same filtration as the brand name filters with greater value. Filters are offered in a MERV 8 MERV 11 or Odor Ban filter rating.Actual Dimensions 20.625 x 26.25 x 4.9375 Space Baron Trane Perfect Fit Series Residential Air Cleaner replacement filters are 5 deep pleated Quality Pleats that are specifically designed to replace other comparably sized ducted air products. Space Baron Trane Perfect Fit Series is available in 3 efficiencies including MERV 8 MERV 11 and Carbon medias.Trade names and company names are used for identification purposes only. Manufacturer Quality Air FiltersSKU 2511150MPN SBPFR21MMQPUnit Box of 2Actual Dimensions 21 x 27 x 5Quality Filters