Pyrex* Heavy-Duty Round Bottom with Screw Cap

Tubes are useful for the handling of sputum specimens. Digestion, shaking, neutralizing and centrifuging can be performed in one container. They are also useful for other clinical and microbiological tests. Screw caps resist the effects of temperature and steam. The 50 ml tube has a black phenolic cap with a glued-in, white rubber liner. The 100 ml tube has white polypropylene cap with a Teflon* liner.