Lonvitalite Face Derma Roller Replaceable Head 600 Needle AttachmentThe derma roller 0. 5mm face replacement head is designed to help you save money without compromising on quality. With 600 high quality titanium needles at a depth of 0. 5mm, this attachment targets concerns situated in the deeper layers of skin such as acne scarring, collagen and elastin loss, and deeper lines and wrinkles. This facial roller replacement head is designed to be used with The Face and Body Kit, making it easy to fit and replace when