Attwood - Turbo 4000 Series II In-Line Blower - Water-Resistant - 12V - White - 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 industry provide such powerful system output at such a low power input in a compact size.. Patented in-line design - provides ventilation for engine compartments, galleys, bilges, and heads. Mounting feet allow vertical or horizontal installation in confined spaces. Install with #10 fasteners. Individual carton includes 2 tie straps. All are CE certified. 16-gauge tinned and caulked copper wire leads.. Features:. Nickel-plated motor can for corrosion resistance. Stiffening ribs to reduce housing distortion