Conical bottom with skirt. Autoclavable. Suitable for cryogenic storage at -80ºC. Certified DNAse, RNAse and Pyrogen free. Withstands high RCF of 16000xg. Leak proof. Highly visible solvent resistant graduations and labeling area. Sterile reference is by radiation. Sterilization certificate included (to be downloaded free of charge here). Resealable bag