Numbers for the AMS Lite which allows you to easily identify the filament locations.
The large number is the filament location that faces you and the small number is the one behind it.
The numbers are printed with the numbers facing down to create a nice, smooth sign.
The back of the numbers is slightly adapted to the curve of the AMS Lite in order to better center and glue the sign.
Stick with either a thin double-sided tape or superglue.
Have fun with it