A PLUS Jointed Round Bottom Flask – 3‑Neck, 250 ml, 19/26 (ASTM‑Accredited Borosilicate Glass)

This high‑quality A PLUS Jointed Round Bottom Flask is manufactured from durable 3.3 borosilicate glass, ensuring excellent thermal resistance, chemical stability, and long‑lasting performance in educational and laboratory environments. As part of an ASTM accredited glassware range, it offers outstanding value while remaining fully compatible with Quickfit jointed components.

Featuring a 250 ml capacity and a three‑neck design, this round bottom flask includes a central 19/26 joint and two angled 19/26 side joints. This configuration is ideal for complex experimental setups, including multi‑step reactions, reflux systems, distillation assemblies, and procedures requiring simultaneous attachment of condensers, thermometers, dropping funnels, or gas inlets.

Key Features

• Manufactured from strong 3.3 borosilicate glass for chemical and thermal durability
• ASTM accredited for consistent, laboratory‑grade performance
• Fully compatible with Quickfit jointed systems
• Three 19/26 ground‑glass joints: one central, two angled side necks
• 250 ml round bottom ideal for even heating and chemical reactions
• Perfect for reflux, distillation, multi‑neck reaction setups and gas handling
• Provides excellent stability when clamped for heating applications
• A durable, cost‑effective alternative to premium branded multi‑neck flasks

Ideal for School Science Lessons & Laboratory Use

Ideal for GCSE and A‑Level chemistry, this three‑neck round bottom flask supports advanced practical work and demonstrations. Its versatile design is perfect for teaching students about multi‑step reactions, reflux systems, distillation processes, gas inlet techniques, and controlled heating.

• Setting up reflux experiments using condensers and thermometers
• Teaching distillation and purification techniques
• Demonstrating gas‑inlet reactions safely
• Providing multiple access points for addition funnels, probes, and sensors
• Supporting technicians in assembling advanced reaction apparatus
• Offering students hands‑on experience with multi‑neck laboratory glassware

Strong, reliable, and excellent value, the A PLUS 3‑Neck Round Bottom Flask is a key piece of equipment for any school or laboratory performing advanced chemistry experiments.