Kimble 41901R KIMAX PTFE Color-Coded ST Key-Head Stoppers are used with flasks, mixing cylinders, separatory funnels, etc. All stoppers, sizes 9 through 22 are solid, and sizes 32 and 38 are hollow. Designed from ASTM Specification E675.
(Sample Photo Displayed. Individual items may differ from the image shown)
Stopper Size: 22
Color Code: Yellow