Deschem 25ml,24/40,Single-Neck,Round Bottom Glass Flask,1 Neck,Lab Boiling Vessel

Good quality, no issues with its use. As good as other higher priced flasks out there.

This is my favorite 1L rbf, now 😊

Came with a few cracks in the glass, the worst being on the ground female joint which makes heating from below, as well as clamping in a stand a bit worrisome. However, I haven't had any issues with my purpose for it. Maybe consider something more reliable if planning onĥh cold shocking or applying intense heat directly. Shipped from China if I remember correctly. Didn't take too long.

This is the only place that even had a 150 flat bottom boiling flask. Good products. Deschem is a good choice!

24/40 is correct which was my big concern.

things are always late and mostly broken. They also make it hard for you to be refunded.

Always great packing best Chinese lab glass available packed in foam every time great company worth the wait

this round bottom flask looked clean and professionally made, and the glass clarity was actually better than I expected for the price. The 24/40 joint fits properly with my existing lab setup and seals without wobbling, which is important when heating. The 1000 ml marking is visible and accurate enough for general lab or hobby use. That said, the glass feels a bit thinner than premium lab brands I’ve used before, so it requires extra care during handling and heating. It works fine on a heating mantle, but I wouldn’t feel comfortable pushing it to aggressive temperature changes. For basic experiments, distillation practice, or non-critical lab work, it does the job without issues. However, if this were for daily professional use or high-stress applications, I’d probably invest in a heavier-duty option. Solid functionality overall, just not built like top tier lab glassware.