Centrifuge tubes are made of high quality PP.The pipe wall’s is even and on them there is graduation,you could read the volume of the solution and it is especially convenient for the recycling of the concerntrated solution.The unusual Sealing Cover avoids solution leakage and could also be HTHP sterilize.It can resistant from high temperature 120 â to low temperature -196 â.When HTHP sterilize,they will not out of shape.On the conditon of powerful centrifugation,they will not break.