Features: This Breaker is made of plastic and metal material, which is shock-resistant, corrosion-resistant, high temperature resistant, and aging resistant, with deformation, combustion, or short circuit phenomenon. Automatic reset (T1) circuit breaker for automatic type fuse blocks Suitable for battery and alternator connections. Universal Application: for Automotive, Car, Truck, Boat, Tankers, Marine, Suv, Yacht, Rv, Van, Ships etc. Specification: Voltage: 14V DC Material: Plastic, Metal Color: Green Terminal: 30A Size: 35x12.7x6.4mm / 1.38"x0.50"x0.25"(L*W*H) Note:Please allow 1-3 mm manual measurement errors.Package Included:2 Pcs Automatic Reset (T1) Circuit BreakerFuses Protect Your Power Distribution System: You need them to prevent damage to your equipment from current overload. The job of an fuse is to protect any of your equipment's vital wiring. Vehicle wiring can be pretty deeply entrenched and integrated into an electrical system making it extremely difficult to locate and replace. When a current large enough to fry a wire or damage a vital component is drawn through some electrical system in a vehicle, the vehicle's fuses will prevent that current from doing any problems.