Designed for use with the Caraway technique
· Packed in lint-free boxes
· Ends may be sealed with clay or caps
· Heparinized tubes are evenly coated with ammonium heparin to prevent coagulation and do not interfere with sodium identification
· Sodium or lithium heparin is available as a special order
· Manufactured from 90 expansion soda lime glass conforming to USP Type III requirements