Needle Length and Function: 0.25mm - baldness, fine lines, gray or thinning hair, topical agents help penetrate and thicken the epidermis 0.5mm - alopecia, deep wrinkles, facial rejuvenation 1.0mm - loose elasticity, cellulite, stretch marks, skin Pigmentation 1.5mm - acne scars, large pores, deep wrinkles, anti-aging, chickenpox scars how does it work Micro needles cause minor trauma to the outer layer of skin. This stimulates the skin's healing process, leading to skin regeneration and production of anti-aging substances such as collagen and elastin. The Derma Roller, on the other hand, uses short needles to create tiny tracks on the skin. Serum can use these pathways to penetrate deeper, absorb more efficiently, and hopefully produce more visible effects.SPECIAL REMINDER: Do not use inflamed skin, contagious skin, skin with fungal infections, acne. If you are concerned about your skin quality, please consult a dermatologist before using. Stop advising if you have skin allergies. BUY WITH CONFIDENCE: We are 100% assured that you will love our derma roller micro needling kit. Your pleasure and satisfaction is our promise to you. Our derma roller stimulates your skin's healing process, leading to skin regeneration and production of anti-aging substances such as collagen and elastin. SAFETY FIRST: Clean the rollers with an alcohol solution before and after each use.Wash skin and pat dry. Roll the microneedle derma roller back 4-5 times. Apply pressure being careful not to pierce the skin. FEEL YOUR SKIN SMILE: Looking your best has never been easier or more affordable. Using the Microneedle Derma roller in less than 5 minutes, combined with your favorite topical remedies, will completely improve and speed up your entire skin care routine. GET THE GLOW: Promote healthy skin with your favorite products. A beauty needling device for the face that gives you a healthy glow. We want you to look your best every day with the right beauty tools.