The K016 is supplied in two screw cap microtubes, labeled A and B. Tube A, which has an orange cap, contains 0.5 mL of dehydrated antibody reconstitution buffer. Tube B, which has a blue cap, contains the dehydrated concentrated monoclonal antibody. The light green color is the combination of No. 1 blue and No. 5 yellow food dyes, it serves as an indicator for the reconstitution procedure.