Variable reflux distillation head is a piece of laboratory glassware used to control the reflux ratio in a distillation setup, allowing for a higher purity of the distilled product. 

* Glass Material: made from borosilicate glass, offer exceptional chemical and thermal shock resistance. 

* High Purity:The ability to precisely control the reflux ratio allows for a much higher purity of the final product compared to simple distillation. 

* Continuous Operation: The stopcocks facilitate the changing of receivers, allowing for uninterrupted distillation. 

* beautiful appearance: uniform wall thickness, no bubbles, the standard size and durable.