With lip Tubes 10 mm through 18 mm o.d. have marking spot. Listings indicate length x o.d. in mm.

Beaded rim These test tubes are well annealed, resistant to heat and chemically stable. Rims are fire-polished. The 25mm tube does not have a marking spot.

Reusable PYREX rimless culture tubes offer greater convenience in plugging and rack storage. Ends are fire-polished. The 22 and 25mm o.d. tubes do not have marking spots.

These PYREX® culture tubes are supplied with phenolic caps to facilitate handling and sealing after autoclaving. Caps are fabricated from a special formula resistant to the effects of temperature and steam in autoclaving and are provided with a glued-in, white rubber liner. The white enamel…

These reusable PYREX® rimless culture tubes offer greater convenience in plugging and rack storage. Walls and bottoms are of uniform thickness. Ends are fire-polished.