## Description - Ends can be sealed by flame, sealing clay or caps - Manufactured from low-taper, soft glass - Tubes are packed in plastic vials with reclosable snap-lock caps to maintain cleanliness - Red band on tube indicates heparinization; blue band indicates nonheparinized tube - Interior surface of heparinized tubes is evenly coated with ammonium heparin (4 to 7 USP units), which will not interfere with sodium determination ## Specifications ||| | ------------ | ------------ | |Product Type|Heparinized Tube| |Material|Glass| |Diameter (Metric) Inner|1.1 to 1.2mm| |Capacity (Metric)|70μL| |Color|Red| |Length (Metric) Tube|75mm|