the blemish is minor, we had to redrill the hole for the magnet in the bottom of the pipe after they had already been dyed and polished.
This caused a small hole (very small) perhaps a small crack (again barely noticeable) and in some cases a difference in the color of the dye where the magnet sets. All that and I'll say this, these things are indeed minor, If they weren't I would throw them away.
