Size 11 Pure Gum Rubber Stoppers will plug food containers, lab vials and other openings Pure Gum Rubber useful to 220º F and in applications with moderate chemicals, alocohols and organic acids. Do not use with strong acids, fats, grease or hydrocarbons.
I really like the rubber stoppers that I got. They worked perfectly and I got them so fast. I was very impressed Thank you
Rowena M, Kansas - 1/25/2020
Well made product
These are very well made and fit perfectly in the carboy I use them in. Thanks.
Josh, Round Rock, TX - 5/22/2019
I ordered NO.10 and 11 gum rubber stoppers. These were received as described within 5 days from the time the order was placed. The company has items which I could not be find elsewhere.