United Scientific Cryo Vial, External Thread, 18ml Round Base

United Scientific Supply Cryo vials are designed for storage of samples as low as -196В Degree C DNase, RNase, and Pyrogen-free Radiation sterilized Polypropylene vials feature a large white frosted labeling area, silk screen graduations, and a leak-proof High Density Polyethylene cap Skirted base vials have an internal flat bottom Star base and round base vials have an internal U-shaped bottom Self-standing star base vials are designed for one-handed use with a support rack Not recommended for use in the liquid phase of liquid nitrogen Can be used in vapor phase of liquid nitrogen - USS