Fisher SpeedyVap Ribbed Watch Glass - Beaker Cover (90mm)

Price is for one watch glass.

The heavy-duty SpeedyVap 90mm diameter ribbed watch glasses are designed for use as covers for 400 mL PYREX beakers. Ribs are molded into the glass so that they can't pop off as they do when cane is sealed to standard watch glasses. Permits escape of excess vapor and eliminates risk of contamination from dropped hooks or props. Meets EPA requirements for methods 3005, 3010, and 3020.