Vortex VMF400 Inline Fan 157 CFM 4" fan 1 AAA battery included -

1 AAA battery included - simply power on and go

Available in duct diameter from 4" to 8"

Alfred's Digital Temperature Controller for Heat Mat

Brilliantly simple design that's easy to use

Vortex VMF400 Inline Fan 157 CFM 4" fan 1 AAA battery included -Vortex VMF400 Inline Fan 157 CFM 4" The VMF400 is an in line duct fan specifically designed to maximize the airflow performance with minimal noise levels in a small, compact housing. These fans incorporate a powerful mixed flow impeller and internal air vanes located at the discharge end of the fan housing. This impeller and guide vane combination provides a smooth laminar air flow which in turn minimizes turbulence and noise and generates an