●[HIGH QUALITY MATERIAL]: Made of high purity PP Material and Max.RCF: 9,400, it can autoclavable at 121℃ and freezable to -80℃.【Pack of 25, 50mL】 ●[LEAK-PROOF]: With longer length screw caps, it is used to prevent sample leakage and it smooth, flat inner surface, no residual solution. ●[STERILIZED]: EO sterilized, Non- pyrogenic, DNase/RNase free. ●[EASY TO READ]: The graduations are accurate to ±2%, start at 2mL, 1mL increments. ●[WRITING AREA]: With a large white printed writing area provide easy and legible mark, and both the graduations and writing areas are chloroform-resistant.