#10 Universal Stopper Solid

#10 Universal Stopper solid for use with 2L Erlenmeyer Flask or the PET/Fermonster Carboys.

Universal stoppers have a longer taper to help produce a better fit and a snug seal, and a lip which prevents them from falling into your container. Available with a 3/8 inch hole for an airlock, or solid with no hole.

#10 size is recommended for PET carboys.