Pyrex 5341-500 Brand 5341 filter flask; 500 mL, case of 1

These filtering flasks feature a standard PYREX® brand heavy wall filtering flask and a bent, polytubulation ina a grommet. The grommet acts as a shock absorber if the flask is accidently upset. All flasks have permanent white enamel graduations and marking spot. The tabulation OD is 12.5 mm.

The thick walls of Corning's PYREX brand filter flasks are designed to provide the additional mechanical strength needed for vacuum work. Therefore, these flasks should NEVER be heated, since heat may weaken the glass. As a safety reminder, the words "Fil