Ideal-Air Back Draft Dampers Size:Ideal-Air Back Draft Damper 6 in (64/Cs) helps your plants get the

helps your plants get the most benefit from photosynthesis

Featuring coco chips (croutons) to balance aeration with lingering water retention

Battery life minimum 1 year (or shelf life of battery)

The Stealth RO 300 produces 300 GPD of ultra pure water

adjustable knob controls fan speed

Ideal-Air Back Draft Dampers Size:Ideal-Air Back Draft Damper 6 in (64/Cs) helps your plants get theThese are excellent quality back draft dampers. They are made from heavy gauge galvanized steel with heavy duty springs. They use both an embossed bead and rubber gasket to help keep ducting securely in place. They prevent back draft air when your fans are off.