Firestone Air Rite Fuse Circuit Tap Kit allows you to add an accessory fuse to your fuse box without having to splice into your vehicle's wiring. The fuse tap plugs into your fuse box and provides ports for your original fuse and the accessory system fuse. The fuse circuit tap kit works on most vehicle fuse boxes. This kit provides a power lead that goes to your accessory system and includes 10-, 20-, and 30-amp fuses.