These vials offer an unrivaled cap seal for the shipping and storage of precious biosamples. The patented cap seal exceeds DOT and IATA regulations. Optional 2D data matrix bar code inserts provide a unique identifier for traceability. The bottom format allows for an unrestricted view of the 2D bar code, convenient for automated scanning. Made from low binding, cryogenic-grade virgin polypropylene. Lot-certified RNase/DNase and endotoxin-free certification provides assurance of product integrity.