Crimson Bird, They are stewart warner 2 1/16 maximum performance electrical gauges and for the price they arent bad. They all come with there specific sensors and wiring them is not bad. I think I have around around $400 in my setup, 3 3/8 tach, speedo, voltmeter, oil press, fuel press, water temp, and fuel level. Normally it would be around $650 for the same setup but I found some smokin deals on these and it saved me a ton. In our circle track racecars we use pro parts spek pro gauges (the same one that all the nascar teams use) I really wanted to put a set of them in my car but it would have been about $1,200 and that was more than I wanted to sped on gauges. They are absolutely awesome gauges tho, the colors and they way they are backlite are second to none.