430829 50mL PP Centrifuge Tubes, Conical Bottom with Cent
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Corning (This is the suggested replacement for 431654)Corning® 50mL clear polypropylene (PP) conical bottom centrifuge tubes come with the advanced polyethylene CentriStar™ caps and are bulk packed 25 per resealable plastic bag. Foam racks can be purchased separately. The CentriStar™ cap has an easy-on/easy-off flat top and offers advanced ergonomics with its wider knurls and roll-over edge design for easier gripping. This leak-proof design comes with a revolutionary plug feature that virtually eliminated all seepage when used under recommended conditions.