Aldrich^® sleeve stopper septa, fluoroelastomer FKM

Aldrich^® sleeve stopper septa, fluoroelastomer FKM, bottom I.D. × O.D. 12.7 mm × 23.7 mm, black, fits 24/40 joints and 64, 80 oz and 1gal jugs

Aldrich^® sleeve stopper septa, fluoroelastomer FKM, bottom I.D. × O.D. 4.2 mm × 10.7 mm, black, fits 10/30 joints