SpiroPure 16.38 x 21.5 x 1 MERV 11 Pleated Filter Air Filters - Made in USA (6 Pack) - Amazon.com
Amazon.com: Enviroflow 16.38x21.5x1 Pollen and Dust Control Pleated Replacement AC/Furnace Air Filter, MERV 8, Pack-4 : Tools & Home Improvement
Filter King Air Filters 16.38x21.5x1 | 4-PACK | MERV 13 HVAC Pleated AC Furnace Filters | Air Purifier | Replacement Filters for Clean, Healthy & Fresh Environment | MADE IN USA - Amazon.com
16.38x21.38x1 Air Filters for AC & Furnace | Filter King