Our 9.5 Drilled Rubber Stopper (DRS) is a pure white gum laboratory stopper that has a top diameter of1 13/16″, abottom diameter of1 1/2″, and a 3/8″ hole drilled in the center, the perfect size for an
airlock
.
This stopper fits most
2000 mL Erlenmeyer flasks
.
The 9.5 rubber stopper is also available as a 9.5 solid rubber stopper.
