Size No. 9 - Black Rubber Stopper - Solid (Qty. 1)

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Size No. 9 - Black Rubber Stopper - Solid (Qty. 1) for 1000mL laboratory flasks 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 Hole Size: N/A Top Diameter: 45mm Bottom Diameter: 37mm Fits Flask size: 1000mL Show more