Carry out a variety of applications with these tubes, which combine the superior separation and pelleting of a conical tube with the higher sealing capability of an Oak Ridge tube. Thermo Scientific™ Nalgene™ Conical Oak Ridge Graduated Polypropylene Centrifuge Tubes can be used in a refrigerated or non-refrigerated centrifuge and can spin up to 10,000 x g with the supplied closure and up to 50,000 x g when equiped with a sealing cap (Cat. No. DS3132-0024), sold separately. Conical tube adapter required (Cat. No. DS3147-0050), sold separately.