Sterile test tubes with overfitting two-position caps are ideal for cell culturing and other applications that require a sterile surface.
Overfitting caps have inner ribs for two-position fits: loose for aerobic culturing and tight for anaerobic culturing and sealing. Molded in tabs allow for easy removal and sealing.
Sterile culture tubes are precision-molded from premium-grade, chemically inert plastic materials: polystyrene for clarity and polypropylene for toughness and chemical resistance. Polystyrene tubes are certified to 8,200 × g. Polypropylene material is almost transparent and withstands centrifugation to 10,000 × g.
All tubes are packaged in easy-to-open bags of 25 tubes each, or individual pouches. Gamma radiation sterilized and shipped ready-to-use.