Size No. 9 - Black Rubber Stopper - Solid, 1-Hole, & 2- Hole

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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, and Filtering Flasks, to prevent liquid from escaping. Specifications: Size: 9 Structure: Solid, 1-Hole or 2-Hole options Hole Size: 5mm Top Diameter: 45mm Bottom Diameter: 37mm Fits Flask size: 1000mL VEE GEE brand Erlenmeyer flasks Show more