#8.5 Solid Rubber Stopper (SRS)
The #8.5 Solid Rubber Stopper (SRS) is a solid pure white gum laboratory stopper. The top diameter is 1 11/16" and the bottom diameter is 1 7/16". This stopper is solid and does not have a hole drilled in it. A perfect stopper to use if fermentation has ceased or you are storing your clean and dried container.
The #8.5 rubber stopper is also available as a #8.5 Drilled Rubber Stopper (DRS).