KIMAX® Squibb Pear-Shaped Separatory funnel with RAY- SORB® and color coded handle are supplied with a PTFE stopper and stopcock. Lower stems have an I.D. large enough that a column of liquid will "break" with the stopcock closed, thereby giving a more complete separation and eliminating the necessity of emptying the funnel. RAY-SORB® protects materials that are sensitive to the light of shorter wavelengths. Designed from ASTM Specification E1096, Type 4 Requirements. Replacement Stopper: 41901R. Capacity: 250mL. Stopcock Size: 4. Stopper Size: 22. Handle Color: Yellow. Stem Length: 60mm. Kimble® #: 29052F-250.