The FirstMate Marine Electrical Repair Kit - Twin Kit Series (1 Per Quantity) The security you need to set sail with confidence. Stocked with premium nylon double crimp terminals single-wall shrink tube pieces natural and UV black cable ties UL approved tinned wire and a crimping tool. A little bit of everything for marine applications. All contained within a durable lightweight carrying translucent carrying case (11" x 6-3/4" x 1-3/4").