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.