The stone lot arrived today. They seem to be in good shape a few small chips some were from shipping but they are at least in areas that won’t affect performance. But I think the light gray one is a carborundum, looks a lot like one side of the 103 I have. The black one I have no idea what it is. Now I need to clean them up to get the gunk off. I figure soap and hot water with a soft toothbrush should do it. Here’s the pics enjoy!
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