Disposable Glassware Culture Tube, Screw Cap Finish, Overflow Volume: 8 mL

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 mL to 33 mL.

• 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
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