Thought you guys might like a peek at these: 2.5 ounces, pure tin. This was my first mold using pourable silicone, which I like a lot better than the mold putty I used for my first two molds. Much easier to deal with, though it takes a couple of days to make a 2-part mold. Still having trouble getting smooth pours, though a little sanding/polishing with the Dremel takes care of it. I suspect the tin might not be getting quite hot enough - I've been using a Hot Pot 2; maybe a better melter would improve the results. Still, I'm very pleased with the action on these.