Falcon™ 12 x 75 mm, 5mL polystyrene or high clarity polypropylene round bottom test tubes. 1400 RCF rating for polystyrene and 3000 RCF for polypropylene. Ideal for flow cytometry applications. With dual-position snap cap. Provides reliable containment of laboratory fluid samples. Falcon™ tubes are widely referenced in published procedures and protocols. Polystyrene tubes are best suited for procedures requiring high optical clarity. Dual-position snap caps with heavier gauge walls and unique construction provide a secure, positive seal. Individual packaging allows aseptic access.