540 needle microneedle derma roller for hair, beard, and facial skin, needle diameter 0.2mm-3mm, suitable for face, body, and scalp. This 540-needle titanium microneedle roller can be used for hair and beard care, making it an ideal choice for beauty, skincare, spa, self-care, skincare tools, facial care, beauty expert supplies, massage, facial massage tools, and face roller.