A PLUS Jointed Round‑Bottom Flask – 250ml, 19/26 Joint

The A PLUS Jointed Round‑Bottom Flask (250ml, 19/26) is part of a high‑quality yet economical range of ASTM‑accredited 3.3 borosilicate glassware. Fully equivalent to and compatible with Quickfit® components, this flask provides exceptional thermal resistance, chemical durability, and reliability for routine laboratory use.

Designed with a classic round‑bottom shape, this flask ensures uniform heat distribution and reduced stress during heating. It is ideal for reflux reactions, distillation setups, boiling, and medium‑scale synthetic chemistry. The precision‑ground 19/26 joint offers a secure, leak‑free fit in standard jointed glassware assemblies, making it suitable for both education and research environments.

Key Features

• 250ml round‑bottom flask with 19/26 ground‑glass joint
• Manufactured from ASTM‑accredited 3.3 borosilicate glass
• Fully compatible with Quickfit® jointed glassware systems
• Excellent thermal and chemical resistance
• Ideal for reflux, distillation, heating, and synthetic chemistry
• Durable, clear, laboratory‑grade construction for long‑term use

Ideal for School Science Lessons

This 250ml flask is perfect for GCSE, A‑Level, IB, and undergraduate chemistry. Its larger capacity makes it well‑suited to practicals requiring higher reaction volumes, while maintaining the strength and thermal stability needed for safe heating and distillation.

• Suitable for reflux reactions in organic chemistry
• Used in distillation assemblies with jointed fittings
• Ideal for heating, mixing, and medium‑scale reaction volumes
• Supports technician‑prepared demonstrations and whole‑class practicals
• Helps students develop real‑world laboratory glassware handling skills

Strong, reliable, and excellent value, the A PLUS Jointed Round‑Bottom Flask 250ml (19/26) is a dependable addition to any school or laboratory glassware collection.