#6.5 Solid Rubber Stopper (SRS)
The #6.5 Solid Rubber Stopper (SRS) is a solid pure white gum laboratory stopper. The top diameter is 1 3/8" and the bottom diameter is 1 1/8". 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. Fits most 3, 5, 6, and 6.5 gallon glass carboys.