14x14x1 Pure Green Plus Carbon Eco-Friendly AC Furnace Air Filters 24 Pack organic The round duct tailpiece is

The round duct tailpiece is compatible with 4” inline exhaust fans

under good conditions

That means that when properly installed no light will penetrate the ducting and disrupt your plants' lights out schedule

The mats’ patented double-layer construction is tough and waterproof

14x14x1 Pure Green Plus Carbon Eco-Friendly AC Furnace Air Filters 24 Pack organic The round duct tailpiece isPure Green Plus Carbon Eco Friendly AC Furnace Air Filters by Nordic Pure starts with an environmentally responsible non woven, high loft, antimicrobial filter media made of fine gauge polyester. As we continue to keep our eyes on media technology advances, our Pure Green media will be changing its appearance. Please expect the same quality and performance you have come to rely on from our Pure Green media which will now be white in color on the