DescriptionAre you looking for a professional, yet affordable laboratory stopper? Are you in search of a sturdy, trustworthy tool that can be used to do multiple jobs at once? If yes, look no further Our high-quality laboratory stopper must meet your needs. Smooth and durable, will not do damage to the bottles in laboratory. It is one of the best choices for you.Features- Material: Rubber.- Size: 3.50X3.00X1.50cm/1.38X1.18X0.59inch.- Constructed by using high-grade material, ensures it safety and can use it with confidence.- Multi-functional and versatile, can be used for professional and personal use.- Suitable for infusion bottle, glass bottle and other laboratory equipment that need to be sealed.- These rubber stoppers are using a suitable shape design, easy to insert and pull.- Smooth and durable, will not do damage to the bottles or infusion bottle in laboratory.