X8311-20" x 20" x 5" Healthy Climate HCXF14-11 Expandable Filter, MERV 11$$Tools & Hardware Other

Filter dimensions: 20" x 20" x 5" (Actual Size: 20" x 19-3/4" x 4-3/8") HCXF14-11 MERV 11 Expandable Pleated Replacement Media 1 1