17_3/8x35x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack trays hemlock woolly adelgid (Adelges tsuga)

hemlock woolly adelgid (Adelges tsuga)

Supports aggressive stem and leaf growth and flower and fruit production

Each pair of boot covers is individually packaged to help prevent cross-contamination

a powerful source of potassium and magnesium that is carefully mined from ancient sea beds in the desert of the American Southwest

For added convenience and customization

17_3/8x35x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack trays hemlock woolly adelgid (Adelges tsuga)Nordic 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