Product features: 1. All the conductive configuration materials inside are copper. 2. The knob is equipped with a spring, which is very manipulable. 3. Strong compactness, portability, maneuverability, and the shape is just stuck on the mounting plate. This product is widely used in trucks, cars, RVs, boats, etc. as batteries. It is easy to install and can be used alone or in combination with other switches to isolate and protect electrical systems from 12V to 60V. Product specifications: rated current, voltage: 300A 60V; DC dielectric strength 15000 VAC/min Electrical life: 10000 times Screw diameter: 11mm Chassis circle diameter: 68mm Voltage: 12V ~ 60V DC Continuous stream: 300 Rated current: 300 Current: 300 - 500 Rotation angle: 90 Operation: On/Off Current switch, maximum load 300 amps! The diameter is 68MM, the distance between the fixing screw holes is 44MM, the total height is 95MM, the wiring copper screw is 11MM, and the red knob is fixed , cannot be removed. (Manual measurement error range 1--2MM) Weight: about 303g color: red Material: high quality material Quantity: 1pcs Packing list: 1 knob switch Only the above package contents are included, no other products are included. Note: The reflection of light and different monitors may cause the color of the item to be slightly different from the actual item. Measurements allow +/- 1-3 cm.