These tubes are supplied fire polished at the colour-coded end, which should be sealed with the Sigillum Wax. Fire polishing reduces wear on the centrifuge seals.

• Each heparinised tube contains at least 4 IU heparin as prescribed by the Standard
• Tubes are available in two types of packaging: Dispenser vials of 100 tubes each for hygienic and easy handling; and economy cardboard boxes, which reduce transport and handling costs
• Sigillum Wax plate (needs to be ordered separately) has 2×24 numbered positions per pair, which makes it easy to seal and transport samples
• The even wax layer ensures uniform sealing