Vintage wheels offer several ranges of Smiths quality cockpit instruments to add the finishing touches to your cockpit. So if your preference is OEM mechanical .electronic or the new OEM electronic full sweep gauges we can offer all types. Speedometer and tachometer are 100 mm (approx 4 inch) other gauges are 52mm (approx 2 inch) We do have a much larger range available from Smiths so if you dont see what you are looking for call us on 619 952 4717