Ai 24/40 pennyhead glass hollow stopper. Glass material: high borosilicate glass 3.3.

M35 Green Neoprene for added chemical resistance Listed mainly by trade-size, available in solid, one-hole, and two hole rubber stoppers. Uses vary widely, some are outlined below: Carboy Stoppers Crucible Holders Laboratory & Test Tube Stoppers Masking Applications Micro Stoppers Pipe…

These high quality gray chlorobutyl stoppers are used for research and pharmaceutical packaging applications. Universal gray chlorobutyl formulation passes Japanese, European and United States pharmacopeia testing for globally marketed pharmaceutical products Formulation contains no…

Size No. 000, 00 and 0 have hole 3 mm diameter; sizes No. 1 and 2 have hole 4 mm in diameter; all other sizes have hole 5 mm in diameter.