I made this simple wrench so that I can remove/install gauges on my paintball tanks without leaving any scratches, dents or damages. It has the "old" 24mm gauge socket and the "newer" 19mm gauge socket. Both sockets have a 2mm lip on one side so the wrench doesn't fall thru, but the gauge face it is still visible.
I printed mine in PETG, but PLA and ABS should work fine, I also print it with 6 walls and 5 top and bottom solid layers for added strength.
tank_gauge_remover.stl | 344.2KB |