Product Details describe: High current thermal trip circuit breaker with manual reset switch is suitable for other electrical systems. It is ideal for use in harsh environments such as racing cars to provide current overload or short circuit protection. A protective rubber cap prevents unwanted short circuits. Commonly used in truck, bus, RV and marine applications; also used in battery cost and audio systems. Switchable mount circuit breakers are commonly found in auxiliary and accessory circuits on truck, bus, camper, and marine systems. Sealing and waterproofing of engine compartment and bilge areas. The travel switch can be used to quickly disconnect the circuit in an emergency. Coupling bolt nuts have integral locking rings to prevent loosening due to vibration There are 12 specifications to choose from. (30A/40A/50A/60A/70A/80A/100A/120A/150A/200A/250A/300A) Size: 74*49*44 (mm) Weight: 87g Material: zinc alloy Colour: Black Quantity: 1 set Package includes: 1 x Car Yacht RV Crusher