Variable reflux distillation head is a piece of laboratory glassware，Distillation equipment commonly used in laboratories and industrial production. By controlling temperature and pressure, it separates different components from a mixture. 

* 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. 

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