Description These rubber stoppers are designed for laboratory use, providing a reliable seal for various containers. The black color and hollow design ensure a snug fit, making them ideal for sealing vials, test tubes, and other lab equipment. Their durable construction long-lasting performance in demanding environments. Features -Color:Black -Material:Rubber -Size:1.40X1.10X1.10cm/0.55X0.43X0.43in -Note: Suitable for a 9.5mm diameter hole -Material: ensuring the stability and safety of substances within laboratory bottles -Rubber seal: made from rubber material, providing excellent sealing performance to effectively prevent liquid leakage -Versatile use: suitable for various scenarios such as laboratories, chemical reagent bottles, and more, meeting different needs -Soft and flexible: designed to fit holes easily, making them ideal for laboratory, kitchen, and household applications -Multipurpose: for sealing bottles, tubes, and other containers in both laboratory and household settingsPackage list: 8 x Laboratory Sealed Bottle Plug