The IN-17 is a beautiful and tiny nixie tube with digits 0 to 9. Its wire-ended and suitable for direct soldering into a pcb and comes usally with a colored plastic spacer. These spacers can have different colors like withe,grey,black,red. A very special thing is the "true" 5 on this tube, its not like many russian tubes a inverted 2. Due its small overall size (about 15 x 20 mm) its suitable for projects that have to be small sized.