Foam Stopper for Erlenmeyer Flask

This Foam Stopper is for use with an Erlenmeyer Flask or yeast starter. This is the same Foam Stopper included in our Yeast Starter Kit.

A breathable foam stopper is ideal for use in making a yeast starter in an Erlenmeyer Flask. It can withstand boiling temperatures and helps keep dust out of the flask.

This foam stopper is 1 ¾” diameter, and fits our 1000 mL and 2000 mL borosilicate glass flasks.