ORA's replacement heads are designed to replace the fine needle tips in your cordless and rechargeable Electric Microneedle Roller Derma Pen to provide you with a 100% pain-free experience with professional results, all from the comfort of your home. The replacement heads vary in length from 0. 25 mm to 2 mm. Key Benefits: Reduces wrinkles Boosts collagen Reduces the appearance of fine lines Reduces scar appearance | Beauty ORA Electric Microneedle Roller Derma Pen Replacement Heads - 3 Heads Kit (For CORDLESS version only) 3 piece | Dermstore