Microsampling Wings are plastic devices pre-coated with EDTA*2Na used to directly sample whole blood, prepare volumetric quantities of plasma, and securely store samples. Non-volumetric amounts up to 23uL total whole blood volume are sampled per device. Either 5.6uL or 8.1uL volumetric plasma can be generated per device and can be partitioned four ways to meet assay volume needs. Fourteen (14) pieces included. Requires tubes 228-77133-41 for centrifugation.