#7 Solid Rubber Stopper (SRS)
The #7 Solid Rubber Stopper (SRS) is a solid pure white gum laboratory stopper. The top diameter is 1 7/16" and the bottom diameter is 1 3/16". 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. Fits most 3, 5, 6, and 6.5 gallon glass carboys. Sits higher than the #6.5 stopper.
Also available as a #7 drilled rubber stopper (drs).