KIMAX® pennyhead stoppers are used with laboratory glassware such as flasks, mixing cylinders and separatory funnels.
Features & Benefits
Standard Taper size 13 stopper is solid, stopper size 38 is hollow
Designed from ASTM Specification E675
Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements
Length of Ground Zone (mm):14.0