Product description: Power switch is a specially designed for the general truck power switch. Red twisted for the fixed, can not be removed. UV stabilized construction - Built to last in marine conditions. Maximum load is 500 amps. Compact size, light weight, convenient handling. Disconnects the battery safely, to eliminate any power draw from the battery when vehicle or boat is not in use. Specifications: Voltage: 12V to 60V DC. Height: Approx. 92mm3.62inch. Surface height: Approx. 63mm2.48inch. Size: surface diameter: Approx. 68mm2.68inch. Wiring copper screw: Approx. 10mm0.39inch. Fixed screw hole spacing: Approx. 42mm1.65inch. Rated Current: 300A. Moment Max Current: 1000A. Round Disk Diameter: 66 mm. Connection Thread: M10. Mounting Hole: about 7mm. Mounting Hole Spacing: 44 mm. Height: 95 mm. Package Includes: 1 Disconnect Battery Isolator. After - sales service: Please don't worry about after - sales service.We accept returnreplace with any reason. We provide 1 years' for all of our products since the purchasing day. If the product is damaged due to shipping or installation,pls dont hesitate to contact with me, we will send you new one for free.