TUBE, BLD COL PLAIN CLR 6ML PET VACUTAINER (100/BX) The BD Vacutainer® No Additive (Z) Plus Tube is a sterile multipurpose specimen collection tube that may be used either as a discard tube or a secondary tube The BD Vacutainer® No Additive (Z) Plus Tube may be used for routine phlebotomy (venipuncture) only as a discard tube As a secondary tube, the BD Vacutainer® No Additive (Z) Plus Tube may be used for collection and transport of a specimen in a closed system