#12 Solid Rubber Stopper (SRS)
Our #12 Solid Rubber Stopper (SRS) is a pure white gum laboratory stopper. The top diameter is 2 9/16" and the bottom diameter is 2 1/8", and it is solid. Perfect for use when fermentation is complete or to store a clean and dry fermenter.
This #12 rubber stopper is also available as a #12 Drilled Rubber Stopper (DRS).