Attwood Turbo 4000 Series II Water-Resistant, In-Line Blower - 12V - White [1749-4] Sportsman so you know they’re designed

so you know they’re designed for long-lasting durability

MadJax® unique design

Keep your compatible GPSMAP chartplotter safe from the harsh marine environment

Adjustable heat-treated collars for camber adjustability with a 1" thread

Attwood Turbo 4000 Series II Water-Resistant, In-Line Blower - 12V - White [1749-4] Sportsman so you know they’re designedTurbo 4000 Series II In Line Blower Part #: 1749 4 Attwood's improved Turbo 4000 Series II sets the standard for in line blower performance. Utilizing advanced fan blade design techniques, Attwood has developed a blower system that matches air flow of existing in line blowers at a significantly reduced noise level. The first vane axial flow fan bilge blowers designed using aerospace technology to maximize performance. No other bilge blowers in the