NALGENE 1.2, 2.0 and 5.0mL standard and 1.5mL SYSTEM100™ cryogenic vials with bar code are ideal for automated data collection, sample inventory or to mask the identity of samples. Code 128-numeric barcode is printed in black on white background. Human readable is printed below bar code. Guaranteed to have no duplicate numbers. Barcodes are resistant to isopropyl alcohol, 100% butanol, 10-20% DMSO, 5% bleach, 10% acetic and hydrochloric acids and 10% NaOH. Certified sterile, noncytotoxic and nonpyrogenic. Cryogenic vials are packed in easy-open bags inside cases with easy access top opening. Contact NALGENE customer service for information on custom barcodes. RNase/DNase free.