Description:
1.For :19/26 Outer Joint.
2.Material: Stopper made of high borosilicate glass.
3.Hexagon Head Stopper:Reusable, easy to clean, transparent, not easy to break.
4.Stable structure, groove design, easy to rotate, frosted with improved airtightness.
5.Suitable for Lab Glass Stopper,Boiling Flask-3-neck, Glass Bottle, etc.
Package:
2pcs x hexagonal head hollow cone stopper