Culture Tubes, Disposable, with Screw-Cap Finish, United Scientific Supplies

Disposable borosilicate glass culture tube with screw cap finish.

• Type I, Class B 5.1 expansion borosilicate glass
• Heat-treated and securely packed to avoid contamination and increase strength
• Chevron-shaped marking spot for easy orientation reference

Manufactured from 5.1 expansion borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class B requirements, these threaded culture tubes are suitable for a variety of lab settings. Each tube is heat-treated at temperatures exceeding 500° C and immediately packed in a shrink-wrapped cardboard tray, 250 tubes per tray. This process avoids contamination and increases the strength and durability of the glass.

Dimensional tolerances are strictly controlled for a uniform shape, including rounded bottoms and polished tops with smooth edges. Each tube has a chevron-shaped white enamel marking spot. Threaded necks accept a phenolic screw cap, not included. Available in six sizes, from 8 to 33 ml.

Please note: The capacity given below indicates the brim capacity (overflow capacity).