17_1/2x23_1/2x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack -power-&-lamp-cords so it does not have

so it does not have to be mixed with a "spreader-sticker" like the gallon size

Ideal for night time work in indoor gardens and greenhouses

Sonoma Gold Grow and Bloom are all-purpose

Media Uses: May be used with all soilless media

Ignitors are components inside ballasts

17_1/2x23_1/2x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack -power-&-lamp-cords so it does not haveNordic Pure Custom MERV 10 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