Glass Stopper – 24/29 Joint

The Glass Stopper with 24/29 Joint is a precision laboratory accessory designed to provide a secure, airtight seal for compatible jointed glassware. Manufactured from high quality laboratory glass, this stopper offers durability and reliable performance for routine use in educational and professional science laboratories.

Featuring a standard ground glass joint size of 24/29, the stopper fits accurately into matching sockets on flasks and reaction vessels. It helps prevent vapour loss, contamination, and spills during experiments, while maintaining safe and controlled laboratory conditions. Its clear glass construction allows easy inspection of the seal and contents.

Simple, robust, and easy to use, this stopper is an essential component for completing reaction assemblies and sealing jointed laboratory glassware.

Key Features

• Standard ground glass stopper
• Joint size: 24/29
• Provides a secure, airtight seal
• Clear glass for easy inspection
• Durable construction for repeated laboratory use
• Compatible with standard 24/29 jointed glassware
• Supplied as 1 × glass stopper

Ideal for School Science Lessons

Ideal for GCSE and A Level science lessons, this 24/29 Glass Stopper supports safe and professional laboratory practice when using jointed glassware systems.

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

Reliable, precise, and easy to use, this 24/29 Glass Stopper is a fundamental laboratory accessory that helps promote safe, accurate, and effective science teaching in educational environments.