Description Offer the same clarity and performance characteristics as glass with the safety features of plastic Remove the risk of transmission of bloodborne pathogens associated with broken glass tubes Better than film-coated glass because they cannot shatter and escape protective wrap Only a small sample is required—less than 20μL—and unique bore allows user to draw samples quickly Plastic material does not interfere with cell packing Available in 40mm size for use with StatSpin Centrifuges Available treated with ammonium heparin for use in “finger sticks” and untreated for use with anticoagulated blood