iPower 4 Inch 190 CFM Duct Inline Fan with 4" Carbon Filter 8 Feet Ducting Combo for Grow Tent Ventilation Measure Master Pro-Mix® HP Mycorrhizae is a

Pro-Mix® HP Mycorrhizae is a high porosity peat-based growing medium

even in rain

Perfect for indoor and greenhouse plants

locks in place

Standard CO2 injection methods do not allow enough time for the carbon dioxide to mix with the air

iPower 4 Inch 190 CFM Duct Inline Fan with 4" Carbon Filter 8 Feet Ducting Combo for Grow Tent Ventilation Measure Master Pro-Mix® HP Mycorrhizae is a4 Inch 190 CFM Duct Inline Fan Blower: Made with quality UL components for quiet operation. Composite fan blades and center hub which reduces noise and vibration. 4 Inch 1050+ IAV Australia Charcoal Filter: One of the world's most absorbent carbon available; Dimensions: 4" Flange Ducting x 12" Length; Reversible flange. 4 Inch 8 Feet Uninsulated Aluminum Ducting + 2 Stainless Clamps: Flame retardant coating and corrosion resistant wire helix;