These are LED bezels for standard 5mm LEDS

you should stick to one size for everything, so choose one that works for you

We used the 12mm version with success.  There are a LOT of these on the deck, so print a stack and let them run overnight.

We used clear PLA and it worked fine.  The PLA was strong enough to take a hammer to as part of getting them into the deck, so font be timid. 