Stoppers are used with laboratory glassware such as flasks and separatory funnels.
Features & Benefits
Sizes Standard Taper 10/30 through Standard Taper 19/38 are solid
Sizes Standard Taper 24/40 and larger are hollow
Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements