Reddit reviews 500ml Volumetric Flask, 3.3 Boro Glass, Class A, Ground Stopper, Karter Scientific 213W7 (Pack of 2)
We found 2 Reddit comments about 500ml Volumetric Flask, 3.3 Boro Glass, Class A, Ground Stopper, Karter Scientific 213W7 (Pack of 2). Here are the top ones, ranked by their Reddit score.
Class AO.D. x Height(mm): 101 x 273Tolerance(+/-ml): 0.25Flat BottomGround Glass Stopper
That isn't a volumetric device, those marks are painted by a machine, not by a chemist that verifies every glassware.
You need these, which are hand calibrated, if accuracy is important. (500mL volumetric for example)
http://www.amazon.com/213W7-Karter-Scientific-Volumetric-Stopper/dp/B006UKI5G0/ref=sr_1_9?ie=UTF8&qid=1420906445&sr=8-9&keywords=volumetric
http://www.amazon.com/213W7-Karter-Scientific-Volumetric-Stopper/dp/B006UKI5G0/ref=sr_1_9?ie=UTF8&qid=1420906445&sr=8-9&keywords=volumetric
You have to zoom the picture.