200 pieces 20mm vial rubber stopper mushroom self healing rubber vial injection port and aluminum flip caps safe bottle stoppers for 13 mm opening glass vial and liquid culture jars blulu <br>100 pieces 20 mm vial rubber stopper with 100 pieces aluminum flip caps safe bottle stoppers for sealing 13 mm opening glass vial and liquid culture jars <br> <br>practical tool: <br>suitable for solid seal, glass vial, liquid culture jars and so on. there are 200 pieces vial stopper caps, which are enough to use and meet different requirements. <br> <br>wide applications: <br>they can be applied in the kitchen, lab, etc., suitable for storing seasonings, juice, perfume, and any other liquid in your daily life. <br> <br>specifications: <br>color: gray, blue <br>size: 20 mm (13 mm diameter for openings) <br> <br>package includes: <br>100 x 20 mm vial rubber stopper <br>100 x 20 mm aluminum vial stopper <br> <br>warm notice: <br>small objects, please stay away from children under 3 years old.