Features- Needle length: 0.2mm or 0.25mm or 0.3mm or 0.5mm or 0.75mm or 1.0mm or 1.5mm or 2.0mm or 2.5mm or 3.0mm.- Material: medical-grade stainless steel (needle) and hard plastic (handle). 100 percent brand new and high quality 540-Needles Micro-needle Roller Medical Therapy Skin Care Tool. - A common cosmetic procedure for treating many conditions by stimulating collagen and elastin Production. Stimulate the collagen production.- Improve elasticity of skin. - Smoothen acne scars. - Promote skin rejuvenation and improve alopecia.- Mildly roll 10 times vertically and horizontally. Can be used on all areas of the face,javemay. neck and body and scalp.- Can be used by yourself anytime at your personal convenience.- Different needle lengths have different usages:1. Home use: 0.2mm or 0.25mm or 0.3mm2. Clinical use: 0.5mm or 0.75mm3. Medical use: 1.0mm4. Physician use: 1.5mm or 2.0mm or 2.5mm or 3.0mm- Cleaning method1. Soak about 5-8 minutes with 75 percent alcohol. 2. Using ultraviolet to disinfect for about 45 minutes.- Come with a transparent protective box for holding the TinkSky roller.Attentions- Do not force the roller into the skin but simply use mild pressure.- Roll obliquely at the same intensity covering the same areas in both directions (vertically and horizontally). The roller cannot be overused as the needles will remain sharp for a prolonged time.- Not suitable for use onto the following skin conditions: active acne, eczema, rosacea, peonasis, servere solar karatosis and raised moles or warts.- Keep out of reach of children. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store