... , white writing area and black remarks for lab use. Detailed Description of conical centrifuge lab tube:Centrifuge lab tubes are made of medical grade ... with stand,Providing a white writing area and white remarks for easy identification,Sterilized by Gamma irradiation, and Non-pyrogenic,Centrifuge ... stand, sterile >9400G 25 pcs/stand, 500pcs/ctn.... Conical Centrifuge Lab Tube