Oil head made of quartz glass for 20mm heating coil 2

A heating coil with an inner diameter of 20mm can be attached to the oil head made of robust quartz glass with a clear standard cut, so that the head can be heated evenly and comfortably. The risk of accidentally heating the bong's grinding surface is lower. Of course, you can alternatively use a burner to heat the head. It's that easy: Place the bowl on the bong, attach the coil and heat the pan, then drizzle the oil or wax onto the pan using the appropriate tool and take a hit while steam develops! The head is made of quartz glass, which, in contrast to borosilicate glass, is permanently heat-resistant - retains heat better and longer. Signs of wear, such as those that occur with borosilicate glass due to frequent use and exposure to high heat, are generally not to be expected with quartz glass due to the low thermal expansion and high resistance to temperature changes. Attention: The oil bowl/oil nail may only be heated on the pan, otherwise there is a risk that the grinding of the bong will break due to the expansion of the material.