Gauges feature convex (domed) glass lens. 5 gauge kits include speedometer, fuel level, electric oil pressure, electric water temperature and volt meter. Kit contains adjustable depth fuel level sender, oil pressure sender and water temperature sender with adapters allowing it to be installed in 1/8”, 1/4”, 3/8” and 1/2” NPT threads. Speedometer is 3-1/8” dia., all small gauges are 2-1/16”. Individual gauges and senders available separately. Gauge Kits Include a Speedo Sender.