Conical Flask – 250ml with 19/26 Joint (Borosilicate Glass)

The 250ml Conical Flask with 19/26 Joint is a high quality piece of laboratory glassware designed for mixing, heating, and carrying out chemical reactions in school science laboratories and educational environments. Manufactured from premium 3.3 borosilicate glass, this flask provides excellent clarity, durability, and resistance to heat and chemical exposure.

Featuring a standard ground glass joint (19/26), this conical flask allows secure connection to compatible laboratory apparatus such as condensers, adapters, and reaction assemblies. The classic Erlenmeyer (conical) shape supports safe swirling and mixing of liquids while minimising splashing. With its practical 250ml capacity, it is ideal for medium‑scale experiments, solution preparation, and classroom demonstrations.

Designed for repeated use in busy teaching environments, this flask combines strength and versatility, making it a dependable choice for practical science work.

Key Features

• 250ml capacity – suitable for a wide range of experiments
• Manufactured from 3.3 borosilicate glass
• Standard ground glass joint for secure apparatus connections
• Joint size: 19/26
• Classic conical (Erlenmeyer) shape for safe mixing
• Excellent heat and chemical resistance
• Durable construction for repeated laboratory use
• Supplied as 1 × 250ml conical flask

Ideal for School Science Lessons

Ideal for GCSE and A Level science lessons, this 250ml Conical Flask supports a wide variety of practical chemistry activities and experimental techniques.

• Mixing and heating chemical solutions
• Carrying out chemical reactions during practical lessons
• Demonstrating reaction vessel setups using jointed glassware
• Supporting quantitative and qualitative investigations
• Routine use in school laboratories and science prep rooms

Versatile, durable, and easy to use, this 250ml Borosilicate Conical Flask is an essential piece of laboratory glassware that supports safe, effective, and engaging practical science teaching in educational environments.