StonyLab Distilling Adapter with vacuum serrated tubulation for laboratory distillation experiment 14/20, 19/22 and 24/40 Inner standard taper joints to choose from, one is at 75 degree to the vertical tube and the other is 105 degree Stem length: 100 mm, 150 mm and 200 mm Borosilicate glass, heavy duty and reusable Warranty: StonyLab 1-year limited warranty; if received damaged, please contact us immediately; we will solve it until satisfied