Size No. 00 - Black Rubber Stopper - Solid, 1-Hole, & 2- Hole

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Size No. 00 - Black Rubber Stopper - Solid, 1 - Hole, & 2 - Hole (Qty. 1) for 4mm tubing. Laboratory Grade Rubber Stoppers Black rubber Stoppers with low sulfur content. Rubber sto ppers 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: 00 Structure: Solid, 1-Hole or 2-Hole options Hole Size: 3mm Top Diameter: 15mm Bottom Diameter: 10mm Fits Flask size: 4mm Tubing Show more