These centrifuge tubes from Corning are supplied with screw caps. The cap with glued-in white-rubber liner resists effects of temperature and steam. 15 mL and 50 mL tubes are available.
Specification
Material: borosilicate glass Sterility: non-sterile O.D. × L: 28 mm × 150 mm Cap diam.: 24 mm Cap thread: 24-410 Capacity: 50 mL Color: clear