Safe and portable: pack of derma pen micro needles, each cartridge comes in packs, individual packaging, easy to store and carry. (Compatible with Derma Pen Ultima A6 / N2 / M5 devices with bayonet connector). Functionality: Dermapen needles is a cosmetic tool for skin care on the face and body. It can be used together with the appropriate skin care products and promotes the absorption of skincare essence, resulting in rejuvenated skin. Individually packed: it is hygienic and convenient, disposable individually sealed for optimal safety and comfort. Tips for use: disposable needles for single use, use a new needle every time, do not reuse. Do not share the cartridges with others to avoid cross infection.