Glass Stopper – 19/26 Joint

The Glass Stopper with 19/26 Joint is a precision laboratory glassware component designed to provide a secure, airtight seal for compatible jointed flasks and apparatus. It is manufactured from high quality laboratory glass to ensure reliable performance and durability in educational and professional science environments.

Featuring a standard ground glass joint size of 19/26, this stopper fits accurately into matching sockets, helping to prevent vapour loss, contamination, or spillage during experiments. Its clear, robust construction makes it suitable for repeated use in school laboratories and preparation rooms.

Simple, effective, and essential, this stopper is ideal for completing reaction setups, sealing flasks, and ensuring safe handling of chemicals during practical work.

Key Features

• Standard ground glass stopper
• Joint size: 19/26
• Provides a secure, airtight seal
• Clear glass for easy inspection
• Durable construction for repeated laboratory use
• Compatible with standard 19/26 jointed glassware
• Supplied as 1 × glass stopper

Ideal for School Science Lessons

Ideal for GCSE and A Level science lessons, this 19/26 Glass Stopper supports safe experimentation and correct use of jointed laboratory glassware.

• Sealing round bottom and conical flasks
• Preventing evaporation or contamination during experiments
• Teaching correct assembly of jointed glassware setups
• Supporting reaction, reflux, and storage applications
• Routine use in school laboratories and science prep rooms

Reliable and easy to use, this 19/26 Glass Stopper is a fundamental laboratory accessory that helps promote safe, accurate, and professional science practice in educational environments.