Marinco 12VXT SeaLink Deluxe Marine 12-Volt Extension Cord (6-Feet). SEALINK EXTENSION CORD 6 feet of super flexible cable. Receptacle is fully-enclosed in soft PVC with a watertight sealing cap. Plug features an LED indicator light, moisture-proof sealing ring, strain relief and built-in 10A fuse. Exclusive Marinco locking system locks plug into receptacle, preventing accidental unplugging. Yet both plug and receptacle are compatible with most standard 12V plugs and receptacles. 15A rated, 10A fused.