EISCO Boiling Flask, 150ml - Borosilicate Glass - Flat Bottom, Narrow Neck

This 150ml flat-bottom Florence boiling flask is built for high school, college, and teaching lab environments that need durable, heat-resistant glassware for everyday experiments.The flask is constructed from heavy-duty borosilicate glass rated to a softening point of 820°C, annealing point of 565°C, and strain point of 515°C — making it suitable for direct flame, hot plates, and repeated autoclaving. The flat bottom provides stable, hands-free placement on a lab bench or ring stand, and the narrow neck with beaded rim gives a secure grip and accommodates standard stoppers.Dimensions: 5.25 inches tall, 2.75-inch bottom diameter, 2-inch neck length, 0.8-inch neck diameter. Capacity: 150ml. Sold as a single flask. No stopper is included — select a rubber or glass stopper separately to match your condenser or tubing configuration.A straightforward, reusable option for titration, boiling, and heating setups where consistent performance and easy cleaning matter more than novelty.

• Built for direct heat: made from heavy-duty borosilicate glass with a softening point of 820°C and strain point of 515°C, this flask handles boiling, distillation, and heating experiments without cracking or warping
• Autoclavable and reusable: borosilicate construction withstands repeated autoclaving cycles, making it a long-lasting choice for teaching labs that need reliable, cost-effective glassware
• Stable flat bottom with beaded rim: the flat base keeps the flask upright on a bench or ring stand without a stand ring, while the beaded rim on the narrow neck adds durability and a secure grip when pouring
• Compact, precise dimensions: 5.25 inches tall, 2.75-inch bottom diameter, 2-inch neck length, and 0.8-inch neck diameter — sized for 150ml titration, mixing, and heating setups in high school and introductory college chemistry labs
• Single flask, no stopper included: ships as one 150ml flat-bottom Florence boiling flask; pair with a compatible rubber or glass stopper (sold separately) to fit your specific tubing or condenser setup