... 500ml, made from borosilicate glass. Reinforced rim. Accuracy: 5% flask-----we are professional Chinese manufacturer of laboratory glassware, includes: beaker, flask ... , funnel, bottle, Boiling Flask,Conical Flask,Distilling Flask, evaporating dish, Crysallizing Dish, ... , Separatory Funnel, Measuring Cylinder, Volumetric Flask.we can mold and produce all of ...