Sealed Fruiting Chamber .22 Micron Filtration with Air Pump and TimerThis is perfect for sealed fruiting chamber with . 22 micron filtration. Kit includes: 20 40 gallon aquarium air pump 30 minute automatic timer Silicone tubing . 22 micron intake filters (3 pcs) . 22 micron exhaust filters (3 pcs) Drill a 7 mm or 1 4" in the upper center side of the fruiting chamber on both sides so you have air flow. Additional filters are available for this product.