WARNING This brand dermaroller only offer PREMIUM TITANIUM NEEDLES, to keep longer lifespan than stainless steel needles, and to prevent allergic to steel; Detailed instructions in Germany, English, Italian, French and Spanish; Many different models for choice of personal users & business buyers, and for different treatment areas and purposes; CE and ISO approved. A VERY FASHIONABLE BEAUTY METHOD Using tiny needles on the microneedle rollers to stimulate the skin, the microneedle can make more than 200,000 micro-pipes in a short period of time to stimulate the regeneration of collagen for cosmetic purposes. Microneedle beauty allows active ingredients to penetrate the skin effectively. The beauty micro-needle effect is comparable to laser but at fraction of the price. USER GROUPS 0,25-0,30mm: Home used for boosting topical skin care product absorption; 0,50mm: To treat shallow wrinkle, scars, UV damage and hyperpigmentation with the added benet of boosting skin care product absorption; 0,75mm-1,0mm: To induce collagen growth more effective than 0,5mm, the perfect solution for treating shallow to deep wrinkles, scars and stretch marks, cellulite; 1,5mm-3,00mm: To treat deep and severe scarring or stretch marks, cellulite, we recommend to use them on body. FANTASTIC COMBINED DEAL SKINY UP HYALURONIC ACID SERUM-Benefits that you can improve with HA:-intense hydration, long-lasting hydration; drastically reduces fine lines and wrinkles; for a softer, smoother and firmer skin. In addition Vitamin C Serum and Anti-Aging Serum can also be your good choice to see better result before and after using the derma roller.