TUBE, EDTA K2 LAV/WHT RING 13X75 2ML (50/BX 24BX/CS) The interior of the tube wall is coated with K2EDTA The EDTA binds calcium ions and blocks the coagulation cascade VACUETTE® K2EDTA and VACUETTE® K3EDTA Tubes may be used for hematology, immunohematology and viral marker testing