16x21_1/2x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack new_additions Each boot cover is low-linting

Each boot cover is low-linting and sterilized to a 10⁻⁶ sterility assurance level (SAL)

Weekly applications are recommended until infestations subside

The benefits of kelp meal and alfalfa meal enable roses to become horticultural beauties

Packaging Dimensions:                   275mm(L) x 164mm(W) x 62mm(H)

1x TSL2000

16x21_1/2x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack new_additions Each boot cover is low-lintingNordic 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