Mars Hydro 4" Inline Duct Fan and Carbon Filter Combo w/ Speed Controller 3x4 These meters are protected against

These meters are protected against dust and water intrusion from any direction

Only works with equipment that can automatically start running when they receive power from an outlet

The ECS-1 comes complete with another 16ft cable

1x 100ml Amino Treatment

PLUG-N-PLAY- No installation required

Mars Hydro 4" Inline Duct Fan and Carbon Filter Combo w/ Speed Controller 3x4 These meters are protected againstMars Hydro 4" Inline Duct Fan and Carbon Filter Combo w Speed Controller With a 4'' inline fan rated for 205CFM, an activated carbon filter with Australian charcoal, and a knob controller applied to allow easy switching and adjustment of the fan speed, the Mars Hydro 4 inch inline duct fan and carbon filter combo offers you everything you need to set up the ventilation in a grow tent. A good ventilation setup for grow tents measuring up to 3x3 feet.