Working on old penny they seem to be a great alternative to the metal ones which are hard to find.

I have fitted some to one of my machines and they are working well so far and have been subject to over 100 payouts of various combinations. I can't make any promises for long term use at this stage but they look robust enough. They will get you out of a hole if you have a machine waiting for some slides.

Price is for a set of 4