Irregular hair growth? The hair roller, also known as the dermaroller, offers an innovative solution. Its ergonomically shaped handle and 540 titanium needles (1 mm) gently stimulate dormant hair follicles. Applied with simple movements over the hair, the roller not only promotes growth but also optimizes the absorption of our hairpower mesoserum. Discover the secret to thicker, more even hair - with the hairpower roller. TIP: Maximizes the effectiveness of hairpower Mesoserum.