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

The A PLUS 3‑Neck Round Bottom Flask, 250ml is a high‑quality yet great‑value laboratory flask made from ASTM‑accredited 3.3 borosilicate glass. Offering excellent chemical durability and thermal resistance, this flask is suitable for demanding educational and laboratory applications. It is fully equivalent to and compatible with Quickfit‑style components, making it an economical alternative without compromising performance.

Equipped with three 19/26 ground‑glass joints (central and angled side joints), this flask allows flexible setup configurations for experiments such as reflux, distillation, and multi‑step reactions. Its strong round bottom design ensures even heat distribution, while the three‑neck layout provides convenient access for condensers, thermometers, funnels, and gas delivery tubes.

Key Features

• 250ml round bottom flask with 3 jointed necks
• All joints 19/26 – centre and angled side joints
• Manufactured from ASTM‑accredited 3.3 borosilicate glass
• High chemical and thermal resistance for safe heating and cooling cycles
• Compatible with Quickfit‑type glassware and laboratory apparatus
• Ideal for reflux, distillation, synthesis, and gas‑inlet setups
• Durable round bottom ensures even heat distribution

Ideal for School Science Lessons & Advanced Chemistry Practicals

Perfect for GCSE and A‑Level chemistry, this multi‑neck round bottom flask helps students explore more complex practical techniques while maintaining safety and reliability. Its three‑neck configuration is particularly useful in lessons involving apparatus assembly and chemical reaction control.

• Reflux experiments with condensers and thermometers
• Distillation setups requiring multiple access points
• Organic synthesis involving controlled heating and reagent addition
• Gas delivery demonstrations using separate necks for inputs and outputs