Solid Rubber Stopper No. 6 Pack of 10

These long-lasting Rubber Stoppers are made from excellent grade rubber with a low sulfur content and are used to close or seal test tubes. They are no. 6 stoppers that measure 23x23x17mm and are suitable for use with glass or plastic test tubes and Erlenmeyer flasks. These stoppers come in a handy pack of 10 and are ideal for use in the science classroom or laboratory.Long-lasting no.6 rubber stoppersMade from excellent grade rubber with low sulfur contentSuitable for use with glass or plastic test tubes and Erlenmeyer flasksComes in a pack of 10