Are you looking for a practical plug for your experiment? Do you want a reliable Erlenmeyer flask plug? If your answer is yes, please come and take at this product. This Erlenmeyer flask plug is made of high class silicone material, which has the . It will meet your experiment sealing needs. Features - Material: Silicone. - Size: 4.00X3.70X2.70cm/1.57X1.45X1.06inch. - The Erlenmeyer flask plug is manufactured with premium silicone material, special and unique for long time use. - The practical silicone stoppers, easy to pull and remove, save time and labor. - Not only suitable for professional research institutions, but also suitable for individual containers that need to be sealed. - Small and compact, easy to store and use, not taking up any space of home or laboratory. - Suitable for Erlenmeyer flask, test tubes, flasks and other laboratory equipment that need to be sealed. Package list: 5 x Silicone Stoppers