Three styles of cryogenic vials are available: internal thread, external thread, and plug seal. The vials come in 1.2, 2.0, 4.0 and 5.0 ml sizes. All vials are manufactured from polypropylene for use at temperatures to 𤪴 C, have a one-turn open/closure cap and most vials accept cap inserts (available separately for vial identification.) Selected styles are available with self-standing base and locking feature for single-handed manipulation. All vials are supplied sterile and certified non-pyrogenic and RNase- and DNase-free. Storage boxes, vial racks and color-coded cap inserts are also available. Corning Inc.212-771-3634www.corning.com