Features:

  • STANDARD SIZE--- This round bottom flask designed with 24/40 standard taper outer joint,interchangeable,leak-free,comparing to common boiling flask without ground joint, it is convenient,safe,easy-operation in laboratory glassware setup. Capacity of 500mL.
  • HEAT-RESISTANT DESIGN ---With spherical bottoms,this RBF is more resistant to fracturing under vacuum, as a sphere more evenly distributes stress across its surface. Laboy glass flasks are heavy wall designed,made by hand-blowing to ensure uniform wall thickness, made of high-quality borosilicate glass and annealed at 800 degree Celsius ,can be heated directly in an open flame and can withstand typical laboratory thermal variations in Chemistry processes like heating and cooling.
  • WIDELY USED----The round bottom flask is widely used in organic chemistry,in a distillation or vacuum distillation apparatus ,it’s used a a distillation flask and receiving flask with a glass condenser and some adapters like the 14 way distillation adapter,take-off adapter;In a reflux process,it’s used as a reaction flask with a reflux condenser.It is also used as a Distilling flask in rotary evaporators.
  • HIGH QUALITY---Laboy glass condensers are all made of high quality boroslicate glass according to ASTM E438,heavy wall design,durable and reusable.The ground joints are precisely grounded according to US standard.
  • BUY WITH CONFIDENCE----100% 90 DAY MONEY BACK GUARANTEE simply return for a full refund,no question asked
nicely made

It took a little longer than I expected for these to arrive, but they seem quite nice. The only thing I've done so far is check the fit with my heating mantle and they are slightly under size. That isn't a big deal in my case - the actual total volume doesn't have to be exact and they do vary between manufacturers. If I can remember to do so, I'll update my review with the actual dimensions. update: the measurement is a little tricky - my calipers don't have jaws that reach far enough to make it to the center diameter, so I had to find a different way to do it. I got 3.960 inches (100.6mm) for the largest diameter.

Lab Boy is great

I like lab boy products a lot. problem is I am still waiting for the top for these flasks... Same order as this, but never showed

No headline thank you

It took forever but they finally got here no cracks no breakage all in all intact

Perfect

Thick and perfect for application

Thick, High quality glass

I was surprised at the quality of the glass for this piece, outstanding.

Good price and good quality!

Very happy with Laboy price and quality, again!

Great basic boiling flask

Haven't had any problems with the Laboy boiling flasks. It's only seen moderate use but it looks to be a well made flask. Joints fit nicely.

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