Pyrex9800-13 13 X 100 mm Glass Test Tube With Rim (Pack of 6)

I gotta say its some nice glass. Highly recommend. The difference a good piece of glass makes, wow, without all the details, these are best, flawless glass. They do have a rim and dont come with any top plug. Price seems to bounce from $5-$9.

GREAT PRODUCT

It was exactly what I wanted, exactly what I got, and a good value.

I used these testubes to make a plant propogation station and they were perfect! Great rim on them so they don't fall through the holes. 1/2 drill bit was just right with a bit of sanding! The larger test tubes in the pic are the same brand size 20mm x 200mm

Why name brand and have no problems.