Shop Nilight Remote Battery Disconnect Switch 12V 200A Car Anti-Theft Kill Switches Upgrade Prevent Power Drain with Wireless Remote Control Relay Fobs for Auto Truck RV Boat in high quality, support 2 year warranty. This relay consists of nylon flame retardant shell with pure copper inner core. High quality material is durable and has the characteristics of heat resistance, corrosion resistance and strong electric conductivity.Internal use of pure copper coil, conductive performance is strong, low loss rate.