... , Conical Bottom Aicor Brand 50mL Screw Cap Centrifuge Tubes are designed to meet the needs of your laboratory. ... polypropylene homopolymer, these tubes can withstand forces up to 9,400 RCF. Printed in two colors with a large writing surface ... . - Max. RCF:9400,E-Beam or Gamma Ridiation sterilized. 50ml Centrifuge Tube, Conical Bottom