Store samples securely at low temperatures, including vapor phase Liquid Nitrogen with Thermo Scientific™ Matrix™ 500μL ScrewTop tubes. These tubes are molded from medical grade resins and feature a permanent, high contrast 2D barcode. Used in combination with Thermo Scientific™ VisionMate™ 2D barcode readers, manual and automated capping equipment, and labeling options, the 2D ScrewTop Tubes meet a range of manual and automated long term storage needs.