5 Boxes Crossed-Linked Hyaluronic Acid Hydration Gel Crosslink Formulated 0.03 fl oz/1 ml No Needles for use with cosmetic tool Instructions USE: Intended for facial use, to reduce appearance of fine lines and wrinkles with cosmetic tools. You do not have to use it all in one time. Once open, if you do not use it all refrigerate it for up to 4 weeks. For Cosmetic tools like the Beauty Pen