Superior quality 2D barcoded tubes to assist sample identification. Designed for short or long term storage down to cryo temperatures. Innovative manufacturing. Our tubes are manufactured by a highly specialised and automated process, known as dual injection. This process creates a powerful molecular bond between the clear tube and the black base. The result is the single piece AlteTube. Permanent 2D barcode. The 2D DataMatrix barcode is laser etched on the black base of the tube. Every barcode meets our exacting standards for readability. The durable 2D barcodes are designed to survive in the harshest of lab environments.