Rule In-Line Ventilation Blower - 12 Volt Size:4" Hole Diameter: 3/8 inch

Hole Diameter: 3/8 inch

The AL7211CR (1-3/8"ID) is the perfect holder for boats in the 16 to 31 ft range

Increases fuel economy

For use with GHC 20 and compatible¹ chartplotters to control your autopilot

Rule In-Line Ventilation Blower - 12 Volt Size:4" Hole Diameter: 3/8 inchRule In Line Blower Ducting Part Number: 140 Designed for efficient, high output operation, these blowers feature our exclusive front and rear shaft seals and corrosion resistant motor housings for long life. Compact and easily installed on any flat surface, Rule in line blowers provide higher air flow, lower amp draw, and quieter operation than standard blowers. For International & US Markets. Features Efficient high volume air flow Quiet operation