Suba-seal septa which provide the best quality turn-over closure available with serrated stopper. Suba-seal rubber septa are ideal for air and moisture sensitive chemistry procedures.
19mm (Ref size 37)
This closure has turnover flange moulded to grip outside of container neck promoting a double seal in conjunction with annular serrations on hollow plug. Annular serrations depress themselves against the inside wall of the bottle neck, making each serration a suctions sealing point.
After piercing with a non-coring needle, rubber closes the puncture, protecting the contents of vessel or container from atmosphere.