Hyaluron pen technology advantages: The needles are sterile and you do not have to worry about any infection or skin allergies. This also a great advantage of the derma pen, as the usage of other derma pen in the market can cause pain and will create rashes when you use them. Hereafter, you do not have to bother about fixing appointments with busy dermatologists or visit their overcrowded skin clinics. You can use the derma pen at the leisure and comfort of your home. The device is compact and you can easily carry it while you are on a business trip or while you are on vacations. This is P39 pen, we push new models/color. You can choose 0.3ml, 0.5ml,0.3 ampoule&0.5 ampoule dual pen use , use more area. You need to choose size and color when you add it into cart! If you are looking for a hyaluron pen, ampoules and dermal fillers, then you can choose the options available.hyaluron pen, ampoules and dermal fillers, then you can choose the options available