Blood tracking replacement kit. This Bluestar blood finding replacement kit contains 4 pairs of tablets in their foil packs. This kit allows the you to mix up to 32oz doses of blood finding agent. Once you mix the water and tablets together, you simply spray agent on suspected drops of blood for quick results. This compound is formulated after a special formula dedicated to criminal investigation to help search for invisible blood trace evidence at crime scenes. Hunter safe and environmentaly friendly.