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Chemglass Life Sciences 20-400 Replacement Septa, Minum-Ware

20-400 Replacement Septa, Minum-Ware. Replacement septa for use with MW-102 open-top screw caps on Minum-Ware glassware components. Septa are made of silicone rubber with one side having a RED PTFE face, while the opposite side has an ultrathin covering of polypropylene to prevent needle coring when penetrating septa. Sold in packages of 12 or 144 each.
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