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. It provides powerful system output at a low power input in a compact size. 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 box includes 2 tie straps. All are CE certified. 16-gauge tinned and caulked copper wire leads.