#5.5 Solid Rubber Stopper (SRS)
The #5.5 Solid Rubber Stopper (SRS) is a solid pure white gum laboratory stopper. The top diameter is 1 1/8" and the bottom diameter is 1". 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.
Also available as a #5.5 drilled rubber stopper (drs).