Round Bottom Flask – 250ml, Three Necks (24/29 & 14/23, Borosilicate Glass)

The 250ml Three‑Neck Round Bottom Flask is a versatile and robust piece of laboratory glassware designed for advanced chemistry experiments in school and educational laboratories. Manufactured from high quality 3.3 borosilicate glass, this flask offers excellent resistance to heat, thermal shock, and chemical attack, ensuring safe and reliable performance during repeated use.

This flask features a traditional round bottom design for even heat distribution, making it ideal for controlled heating using mantles or water baths. It is fitted with three precision ground glass necks: one vertical centre neck (joint size 24/29) and two angled side necks (joint size 14/23). This configuration allows multiple connections at once, such as condensers, thermometers, dropping funnels, or gas adapters, making it ideal for reflux, distillation, and complex reaction setups.

With its practical 250ml capacity and multiple connection points, this round bottom flask provides excellent flexibility for teaching higher‑level experimental techniques.

Key Features

• 250ml capacity – suitable for small to medium‑scale experiments
• Manufactured from 3.3 borosilicate glass
• Three‑neck round bottom flask design
• Centre neck: vertical, joint size 24/29
• Side necks: two angled necks, joint size 14/23
• Precision ground glass joints for secure, airtight connections
• Excellent heat and chemical resistance
• Ideal for reflux, distillation, and reaction assemblies
• Supplied as 1 × 250ml three‑neck round bottom flask

Ideal for School Science Lessons

Ideal for GCSE and A Level chemistry lessons, this 250ml Three‑Neck Round Bottom Flask enables students to explore more advanced laboratory techniques safely and effectively.

• Setting up reflux and distillation experiments
• Connecting multiple components in complex reaction systems
• Teaching correct assembly of jointed glassware
• Demonstrating controlled heating with multiple attachments
• Routine use in school laboratories and science preparation rooms

Durable, flexible, and manufactured to high laboratory standards, this Borosilicate Three‑Neck Round Bottom Flask is an essential teaching tool for advanced practical chemistry in educational environments.