* Vacuum jacketed Vigreux distillation head having a sealed on condenser, braced for strength. The top outer joint is for a 1" immersion 10/18 thermometer. Vacuum adapter has an inner joint and a sealed in drip tip.

* Distillation head is made from borosilicate glass, offer exceptional chemical and thermal shock resistance.

* Beautiful Appearance: uniform wall thickness, no bubbles and durable.