Micro-needle Hair Roller is specially designed for people who have hair loss and thin hair problems. It aims to increase serum absorption so that you can deliver the nutrition to the hair follicles. 540 Ultra-thin titanium needles can safely and painlessly roll on the scalp and effectively penetrate the upper surface of the skin. Hair regrowth spray is formulated with natural ingredients that deliver powerful ingredients to the roots of your hair. Spray on scalp to provide thicker, longer and stronger locks. Safe to use at home as the needle tips are at 0.25mm, the ideal size to roll safely over the skin and stimulate the scalp without leaving pain or scarring. The hair roller and spray can be used by both men and women with hair problems. OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.