Kimax® distilling flask with three reference lines. All sidearm tubes are sealed at an angle of 75° from the neck and is 137 ± 3 mm from the bottom of the flask. For use with Haage automatic distillation apparatus or others that call for three thermometer insertion depths. Flasks have an approximate height of 214mm and sidearm O.D. of 7mm. Rubber stopper size is 2. Ref: ASTM D86.