Conical bottom. Suitable for cryogenic storage at -80ºC. Certified DNAse, RNAse and Pyrogen free. Withstands high RCF of 16000xg. Leak proof. Cap Ø 22 mm. 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