Corning PYREX 9990 / Fisher SpeedyVap Ribbed Watch Glass - 75mm and 90mm

Price is for one watch glass - see photos and quantity of each size below. Please specify your preference when ordering. Volume discount may apply.

The 75mm diameter ribbed PYREX / SpeedyVap watch glasses are designed for use as covers for 250 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. - Qty: 23

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. - Qty: 19