Glass made of borosilicate or pyrex is used to make oil burner glass. This is because borosilicate has the thermal shock qualities that prevent your oil pipe or glass oil burner pipe from shattering under extremely high or low temperatures. A glass smoking bowl on an oil burner can have a diameter ranging from 1 cm on a little pipe to 5 cm on larger ones. Oil burning pipes are simple in form but have a variety of features. The vortex produced by the airflow, which is also influenced by the size of the hole in the bowl, is modified by the size of the glass smoking bowls. The thickness of the stem walls will depend on how long it is in order to prevent it from breaking under its own weight. The glass oil burner pipe's design is far more complex than merely a smoking glass bowl fastened to a burner pipe stem. Be mindful of these aspects when purchasing oil burner pipes online because smoking becomes ruined by a bowl stem separation if you get an oil pipe that is too thin to support a large glass bowl.