A key component for your bong. The Glass on Glass Downstem or Sleeve is a borosilicate glass tube with JBD Decal; the tube of glass that joins the bowl and the water within the bubble of the bong.
4.0 inches, 4.5 inches, 5.0 inches, 5.5 inches, 6.0 inches, 6.5 inches, 7.0 inches
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