2 Neck Round Bottom Flask

I love it and I also love the pipettes I bought also thank you so much for helping me further my education on the subject of chemistry, I want to be a chemistry teacher some day and also thank you for sending me a booklet of all the other equipment I will gladly only buy my labware from you, you guys are great and best labware I've ever gotten there's not even a blemish or scratch on the glass, so thank you for your work you guys are truly artist

This is a very well made flask. It is one of the thickest glass flask I have seen and at the price I think you would have a hard time finding a better value. I highly recommend to any one using occasionally or everyday as it will stand up to anything.

good quality, be gentle though it isn’t the strongest

This is a heavy duty high quality glassware product. I'm very happy with the purchase.

It won’t sit up with out holding something to hold it I used the box it came in cut 2 holes in it for it to stick through

Waste of time! as other people mentioned the flask has a big bubble on the bottom.. being a major risk to fill with anything and heat the flask up and put under vacuum. I have purchased other stony labs products without issues. This one is by far the worst quality. I cannot believe they even released these to the market total embarrassment for stony labs!Item Returned.

The ground glass joints are not a standard taper; the outer portion of the taper is too large of a diameter; these will never seal correctly with a vacuum unless you use LOTS of PTFE tape and that will limit temperatures.The neck rims are extremely thick and will not accept standard metal keck clips; you must use plastic or none at all; and even then, the plastic seems to be stretched pretty bad. It seems like most of the thick wall in these flasks is around the stopper.They do handle heat and thermal shock acceptably. Just don't expect precision fits... good for a hobbyist doing non-complex or atmospheric reactions. It is definitely worth to spend the bit more and get a nicer unit.

Great deal and good packaging. Showed up promptly and safe and sound.

Llego puntual y en buena condicion, solo falta verlo en uso en el laboratorio

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gute ware hat aber auch ihren preis,bin allerdings voll zufrieden wie mit allen produkten von stonylab bisher,auch guter service+promt

I've had 2 of these now and both broke after a single use.

perfect for my essentials oils distillating! Thx for the Stonylab's glassware