Ocassionally, these airbubbles causes burnouts, destroying the pipe. So, quality control should avoid that any pipe with these defects is sold. I know I wouldn't sell my pipes like this. Not even as a second or third grade pipe. I Usually keep them, or give them away. I kept the lumberjack's Ghost. After all it is Halloween in just a few days, and who wouldn't smoke a ghost at this day?.
Dimensions:
Length - 160 mm
Height - 44 mm
Bowl diameter - 38 mm
Chamber diameter - 21 mm
Chamber depth - 37 mm
Weight - 42 g