Our #6 Solid Rubber Stopper (SRS) is a solid pure gum laboratory stopper. The top diameter of the stopper is 1 1/8" and the bottom diameter of the stopper is 1 1/16". It does not have a hole, making it the perfect stopper to use if your fermentation has completed or you are storing a clean and dried container. Great for small mouth one gallon jugs.
It is available as a #6 drilled rubber stopper (drs).
