500ml Filtering Flask, Bolt Neck with Tubulation, 3.3 Borosilicate, Heavy Wall, Karter Scientific (Single)

I like the thick glass construction.

Solid and reliable

Sturdy the glass is quality just make sure you clean it right have lasted me 2 years.

I needed to filter and degas small amounts of toxic material; this flask fits the bill perfectly. It has a wide mouth as well for easy pouring; fast delivery was a plus.

The walls of the flask are decently thick. There are a few minor small bubbles in the glass but they do not go deep enough to worry about affecting the flask structurally. There are a couple black rings in the bottom of the flask that appears to be a residue from evaporated liquid.

I needed a larger filter flask to increase my distillate production and I use it along with a Buchner Filter funnel and 3cfm vac pump. With this configuration turning "Green Dragon" into "Golden Dragon" is a breeze!

Thicker than I expected. Good quality, good price.

Sturdy vacuum flask. Nice quality.

Arrived early, just as described, high quality, will make a lovely, efficient water pipe.