Fits all Bob's Jack plates. Complete gauge kit, sending unit, gauge, 24 feet of wiring.? If additional wiring is required, please buy the extension kit, as cutting the wire and splicing will ruin the shielding & Warranty!? All of our Jack plates are pre-drilled for the gauge's sending unit on the back, just line up the sending unit, attach with included hardware, and pull cable up to gauge's mounting location. Unique solid-state transducer. Sensor reads every ¼" rise and lights a corresponding LED. Special photoelectric eye precisely regulates LED brightness. 1 year warranty.