Air Box Refill Carbon Filter Replacement for Air Box 1, 2, 3 Root Spa efficiency

efficiency

3 - 3/4" barbed elbow

5 in Capacity 30 gallons Drainage Grid Diagonal Tray Edge Trimmed Material Recycled and recyclable plastic BPA Free Yes Origin Made in the USA on renewable solar energy

and that is what the size is matched to

It includes simple 1 button calibration for pH 7 and pH 4

Air Box Refill Carbon Filter Replacement for Air Box 1, 2, 3 Root Spa efficiencySpecial 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 Air Filter Stealth 1 2 3, fits these three models. Single Filter. This refill cartridge size is suitable for Airbox 1, Airbox 2 and Airbox 3. (IMPORTANT: Order 1 OR 2 OR 3 cartridges as required for your Air Box unit)