N 11 snap caps with septa. The hard types are used for fim fit and very secure sealing. The soft types are more user-friendly when snapping og removing the caps.
See brochure sheet for N 11 snap caps and septa
Looking for alternative vials and caps? Try the Macherey-Nagel VialFinder. Type your present cat. no. in the field "REF"
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Septa Guide