12 Pcs 5 Inches Borosilicate Glass Tubes, Gtysmox 5 Colors 12mm Diameter 2mm Thickness Glass Tubing with 1 Cleaning Brush

The price and quality of the tubes are excellent. You can't beat it anywhere

Some of the glass tube's inner diameters seem to be slightly bigger or slightly smaller than 8mm. The inner diameter of the blue glass tubes that I received are particularly smaller than all of the other colors and the green glass tubes are particularly bigger. If the Inner diameter dimension isn't important to you, this is a great value for a set of quality glass tubes. Created an awesome dynavap stem with the grey tubes.

Borosilicate glass is durable and reveired as the glass of choice for glass blowers, lab equipment and many other craft applications. This product arrived intact, bundle secured with a rubber band,wrapped in bubble wrap and snuggly placed in a size specific box. Good value for the money.