16_1/2x21x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack ac-/-dehumidification-/-humidification or as decorative top dressing

or as decorative top dressing for container plants

the Hydrofarm Mini Measure Shot Glass is ideal for home

Instructions and lighting recommendations included

saving time

16_1/2x21x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack ac-/-dehumidification-/-humidification or as decorative top dressingNordic Pure Custom MERV 13 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition