4 inch glass reflux still column is designed for use with boilers from 50l to 200l, with 4 copper bubble plates and the glasses are borosilicate, it's durable, food grade and can withstand high temp. You can even stack 2 or more of these to distill more neutral alcohol.
Great reflux section part for distilling vodka, gin, and various moonshine. Using with a dephlegmator it can reach 90+ ABV.