Blunt tip cannulas work through sliding. They can easily slide through the sub cutaneous layers of the skin. They are designed in such a way that they can be used with Hyaluronic Acid (HA). It is their length as well as flexibility that allows for coverage over a larger area surface only through a single entry at one single point. They do not cut through the layers but rather move through the tissues and the vessels like typical hypodermic needles
