4" Kits

Planting medicinal plants 4 inches Inline Fan and Carbon Filter Combo" have three brand ：Stealth, Typhoon and Vortex by Atmosphere.
Vortex Powerfans VBC 400 173 CFM 4" Inline Fan by Atmosphere is specifically designed for warm and humid applications.
Stealth Ventilation Fans features a powerful, maintenance free motor with sealed ceramic-coated bearings housed in a durable, powder-coated casing.
Vortex Powerfans VTX are high performance inline duct blowers constructed from quality steel with heavy duty attractive hammertone powdered coat finish.Vortex COMBO VTX400 Inline Fan + Profilter 45s Carbon Filter

Our store has eight four-foot options for you to choose from：
Vortex VBC400 173 CFM 4" Inline Fan + Pro-Lite Filter 4" x 12" 200 CFM Carbon Filter
Stealth Fan 4" + Carbon Filter Kit
Vortex VTX600 497 CFM 6" Inline Fan + Pro-Lite Filter 6" x 24" 550 CFM Carbon Filter
Typhoon Combo MtAir 416 Carbon Filter + Typhoon 4" 176 CFM Inline Fan
Vortex VBC400 173 CFM 4" Inline Fan + Pro-Lite Filter 4" x 16" 235 CFM Carbon Filter
Vortex VTX400 220 CFM 4" Inline Fan + Pro-Lite Filter 4" x 16" 235 CFM Carbon Filter
Vortex VTX400 220 CFM 4" Inline Fan + Pro-Lite Filter 4" x 12" 200 CFM Carbon Filter