TOP-VIGOR 5Pcs Rubber Tapered Plug, 42mm to 50mm Solid Silicone Stopper, Tapered Lab Seal Rubber Stoppers Lab Plug with Hole Test Tube Bungs for Lab Home Flasks Glass Containers Test Tube, Black

• 【Size & Package】Size: Bottom Diameter: 42mm; Top Diameter: 50mm. In the package of: 5 x Silicone Rubber Plug.
• 【Durable & High-Quality Material】Made from premium rubber, this laboratory stopper offers excellent sealing performance. It is sturdy, durable, and resistant to deformation, making it perfect for long-term use. Additionally, it is washable, ensuring easy maintenance and reuse.
• 【Tapered Design】Featuring a tapered design, this stopper has a smooth surface for easy insertion of glass tubes. The conical shape ensures a tight, secure fit, providing superior sealing and insulation properties, making it ideal for laboratory and industrial settings.
• 【Easy to Use】Simply insert the rubber stopper into the neck of a glass bottle and gently twist to ensure a secure, leak-proof fit. It’s designed for effortless use and reliable sealing.
• 【Wide Application】Perfect for laboratory and industrial applications, this solid rubber stopper is ideal for sealing test tubes, containers, flasks, pipes, and other experimental instruments. It is commonly used for chemical reactions, sample storage, and to prevent leakage during experiments.

Perfect for a wide range of uses, these plugs are ideal for sealing holes in bathrooms, kitchens, garages, and other areas. They can be used with pipes, vents, electrical fittings, and various other fixtures to prevent leaks and enhance safety.