Ours are hand-formed bisque-type ceramic, and something I've carried ever since I had my first internet website going back to 1997. They are flatback, and easy to glue into your designs. If you have ever seen photos of my old early 90's gift line, you quickly realize what free use we made of these components....I was never without them in the workshop, and I'm still not! The 26-27mm size makes a great focal, as well.
