MXBAOHENG 1000ml Distillation Apparatus Kit,glass distiller,distillation apparatus, lab glassware 1.Be made of G3.3 borosilicate glass. 2.With low linear coefficient of expansion is ideal choice for fabricating laboratory glassware 3.Annealing Point--560,Linear Coefficient of Expansion-- 3210-7,Softening Point--820 4.The thickness of the flask wall is 2.5mm.