Pure laboratory-grade stoppers are odorless. #10 Size fits Better Bottle™ PET Carboys (all sizes) and other 1.75" openings. These solid stoppers are great for turning a Better Bottle carboy into an emergency water storage container.
Oct 19, 2019 by W.D. (Will) O'Dell
Q: What are the small and large diameters of this plug?
A: Large top diameter is 2", smaller bottom diameter is 1 5/8"