Widely used: these rubber stoppers are very suitable for laboratory and industrial use, and can be used as bottle stoppers or pipe stoppers in medicine, chemical industry, scientific research and other industries.
Easy to use: Rubber stopper is tapered, easy to pull and insert, reusable and long in service life.
Packaging includes: 22pcs - #000 size 6pcs, #00---#4 each size 2pcs, #5---#8 each size 1pcs, Can meet your different needs.