Size No. 7 - Black Rubber Stopper - Solid (Qty. 1)

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Size No. 7 - Black Rubber Stopper - Solid (Qty. 1), for use with 500mL vee gee brand laboratory flasks Laboratory Grade Rubber Stoppers Black rubber Stoppers with low sulfur conten t. 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: 7 . Structure: Solid Hole Size: N/A Top Diameter: 37mm Bottom Diameter: 30mm Fits Flask size: 500mL Vee Gee Brand flasks Show more