Pyrex - Ribbed Watch Glass/ Beaker Cover - 250mL (12cs)
sku#:
250-0116
Designed for use as a beaker cover. Ribs are molded into the glass so that they can’t pop off as theydo when cane is sealed to standard watch glasses. Permits reflux of digestate and escapeof excess vapor. Eliminates risk of contamination from dropped hooks or props.