Features: Efficiently manage marine boat power systems with this 3 position 300A battery selector switches, featuring brass copper contacts for superior conductivity and a plastic housing resistant to saltwater corrosions. Engineered with marine grade materials including corrosions resistant brass/iron internals and UV stable plastic casing, this switches ensures reliabled performances in harsh marine environments while maintaining compact dimensions for space conscious installations. Ideal for boat owners, marine technicians, requiring dependable power source switching between multiple batteries during extended voyages or emergencies situations. Perfect for sailboats, fishing vessels, and yachts operating in saltwater conditions, this switches handles critical battery condition management for navigation systems, bilge pumps, and onboard electronics with three clear operating positions. The intuitive lever design combines overload protective with smooth 300A current handling, making it essential equipment for maintaining uninterrupted power flows in marine electrical systems while meeting rigorous marine safety standards. Specifications: Component: plastic + brass + iron Size: Approx.13.4x13.4x11x11cm/5.28x5.28x4.33x4.33inch Color: White Package Includes: 1pcs 3 Position Battery Selector switches note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.