Caliza HVAC Pack — 15x18x1 MERV 13 (6-pack)

15x18x1 MERV 13 pleated furnace filter, 6-pack. Nominal size 15×18×1; actual size is typically about 14.75×17.75×0.75 inches — measure your old filter before ordering. Aerostar filters manufactured in Orlando, FL via Factory Direct Filters. Replace about every 60–90 days under normal use.

This shows the type of filter. It may not be the exact size. Use the dimensions in the title.