This product is an efficient and battery cut-off , mainly made of safe and durable copper and aluminum alloy materials. It is gentle and practical and can serve you for a long time. With a reasonable design, the knob is more convenient to use. It has good process details, is safe and durable, can effectively prevent leakage and help you better complete energy-saving work. This is a great battery that will serve you well. Features - Color: Assorted color. - Material: Aluminum alloy, copper. - Size: 8.00X8.00X6.00cm/3.14X3.14X2.36 inch. - Rated current: 300A. - Instantaneous current: 1000A. - Mainly made of aluminum alloy and copper materials, it is safe and durable, with excellent texture. - The scientific design makes it stable and durable, can effectively prevent leakage, and is safer. - It is made of excellent craftsmanship, strong and durable, and practical. - It is designed to help you improve safety and effectively help you save energy. - It can easily help you any power consumption of the battery and safely disconnect the battery when you are not using the vehicle or boat. Package list: 1 x terminals 4 x rubber covers