Lionel O gauge track tie insulator

This is a replacement for the center rail track tie insulator on O27 gauge track. I've found that the stock insulator (made of cardboard) deteriorates and causes shorts. So this eliminates that problem. The insulators are 5 mm across. I can fit 70 of them on a build plate. Just a word of caution: when installing a PLA version, don't crimp them too tightly or they'll snap. If you make them out of TPU, that won't be an issue.