CLS430909 Corning ® microcentrifuge tubes with screw cap 1.5 mL microcentrifuge tube, polypropylene, w/ attached screw cap, w/ 0-ring, sterile, natural, 500/cs Synonym: centrifuge tubes, micrcentrifuge tubes, microfuge tubes, screw cap microcentrifuge tubes eCl@ss 32119210 . NACRES NB.11