centrifuge tube with conical bottom are available in two sizes i.e. 15 ml. & 50 ml. Moulded in Polypropylene, these tubes are clear, strong & safe. These autoclavable tubes are provided with printed graduations on the outer surface. The built in seal ring in the cap makes these tubes absolutely leak proof. These tubes can withstand forces up to 7500x G & 12000xG for 15 ml. & 50 ml. tubes respectively. These tubes are available sterilized.