#11 Solid Rubber Stopper (SRS)
The #11 Solid Rubber Stopper (SRS) is a pure white gum laboratory stopper. The top diameter is 2 1/4" and the bottom diameter is 1 15/16". It is a solid stopper, perfect for sealing a fermenter in which fermentation has completed or storing a clean and dry fermentor.
The #11 stopper is also available as a #11 drilled rubber stopper (drs).