* Spare Nixie tubes are reserved solely for our loyal clock customers to assure continued availability. New old stock tubes, with a digit height of .7", an overall tube diameter of .75", and an overall tube height of 2". These tubes provide the classic soft glow of the original Nixie tube. Identical to the IN-14 tube in size and display quality, however the digit "5" is a true digit "5" just like the original domestic Nixie tubes. You lose the provocative conversation starter of the upside down "2" but you get an authentic "5" in its place!
