The 10.5 Drilled Rubber Stopper (DRS) is a pure white gum laboratory stopper. The top diameter is 2 1/16″, the bottom diameter is 1 3/4″, and it has a 3/8″ hole drilled in the center, the perfect size for an
airlock
.
The 10.5 Rubber Stopper is also available as a 10.5 solid rubber stopper (srs).
