Other Traits
Needle density: 540 needles is a common density for derma rollers, but there are also rollers with fewer or more needles. Higher needle density might be more effective for thicker skin or deeper wrinkles, but it can also be more painful., Titanium needles: These are considered more durable and hypoallergenic than stainless steel needles, making them less likely to cause irritation or rust., Disinfecting solution: Some rollers come with a disinfecting solution to help keep the needles clean and prevent the spread of bacteria., 540 needles: This is a high density of needles, which can provide more coverage and potentially better results. However, it may also be more uncomfortable to use than rollers with fewer needles.