Air Box 4+ Plus Refill Carbon Filter Replacement MrCool Mini Split Air Conditioners your crops will thrive with

your crops will thrive with an efficient and complete nutrient uptake

Heavy 16 is committed to this artisanal approach to quality nutrient production

Plug & Play

shape retention

allowing for unparalleled precision in moisture control

Air Box 4+ Plus Refill Carbon Filter Replacement MrCool Mini Split Air Conditioners your crops will thrive withSpecial Order Note: Returns for Air Boxes not used are 14 days from the time of delivery. There is a 30% restocking fee and must pay for return shipping. This is the Air Box manufacturers return policy. Refill cartridge for Air Box 4+ Plus. Single Filter. This refill cartridge size is suitable for Airbox 4+. Air Box filters usually last 18 24 months but may vary depending on temperature, moisture and other environmental conditions. (IMPORTANT: Order 1