Falcon® 50 mL high-clarity polypropylene (PP) conical centrifuge tubes have a 16,000 RCF rating. These sterile tubes are packaged 25 to a bag and 500 to a case. RNase/DNase-free. Approximate dimensions: 30mm O.D.; 115mm length Sterilized by gamma irradiation, noncytotoxic and nonpyrogenic Dark blue printed graduations and white writing patch Polyethylene flat-top screw cap allows one hand manipulation and provides a level writing area