Argos Microcentrifuge Tubes offer superb quality and performace at affordable prices. The tubes featrue extended lips for easy opening, marked graduations and frosted labeling panels on tube and cap for easy writing and identification. Argos microtubes withstand centrifugal forces of up to 38,000 g and can endure extreme temperatures from -90° C up to +121°C. 0.5 and 1.5mL tubes are manufactured according to the quality assurance system ISO 9001:2000 and crafted from highest quality virgin polypropylene.