Features - Needle length: 0.2mm/0.25mm/0.3mm. - Color: black (handle)+purple (roller). - Material: medical-grade stainless steel (needle) and hard plastic (handle). - 100% 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, 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/0.25mm/0.3mm 2. Clinical use: 0.5mm/0.75mm 3. Medical use: 1.0mm 4. Physician use: 1.5mm/2.0mm/2.5mm/3.0mm - Cleaning method 1. Soak about 5~8 minutes with 75% 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.