Illadelph has separated themselves from the rest of the big name glass companies by working a glycerin cooling chamber in a whole line of tubes. The first coil condensers from Illadelph became popular in 2007 and were built into the tube, forcing you to put your whole piece in the freezer. The glycerin coil has come a long way since, as you can see in this new signature series. This rare beaker bottom stands at 21 inches high and is a 2 pieces set up. The detachable glycerin coil condenser can be put in the freezer for ice cold sessions. Gold frost covers both ends and the down stem. The diffused down stem supports an 18 mm slide. The custom slide included with this tube has a told tint to it and is faceted all the way around. This gold signature series deserves a spot on the top shelf of your collection.