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Size No. 7 - Black Rubber Stopper - Solid, 1-Hole, & 2- Hole
Laboratory Grade Rubber Stoppers
Black rubber Stoppers with low sulfur content. Rubber stoppers are used to close test tubes and lab glassware, such as Erlenmeyer Flasks, Florence (Boiling) Flasks, Distilling Flasks, and Filtering Flasks, to prevent liquid from escaping.
Structure: Solid, 1- Hole, or 2 Hole options
Hole Size: 5mm
Top Diameter: 37mm
Bottom Diameter: 30mm
Fits Flask size: 500mL VEE GEE brand Erlenmeyer flasks