SkinAct Pro Microneedling Replacement Cartridges 10 Pack, Various Needles Both needle counts provide targeted benefits for specific treatment objectives. Microneedling stimulates collagen production for firmer, younger-looking skin and enhances skincare product absorption. It also reduces the appearance of scars, including acne scars and stretch marks, while minimizing enlarged pores for smoother skin texture. Available options 9 needles | 10 Pack 9 Needles: This is considered a shorter needle cartridge with fewer needles. The needles typically penetrate the skin to a shallower depth (around 0.25mm to 0.5mm). For those unfamiliar with microneedling, beginning with a 9-needle cartridge can aid in acclimating the skin to the treatment process. Sensitive Skin: Individuals with sensitive skin may find a gentler approach advantageous in reducing irritation. Superficial Concerns: Treating minor skin issues such as fine lines, enlarged pores, or uneven skin tone may not necessitate deeper penetration. 25 needles | 10 Pack   25 needle cartridge features longer needles and a higher needle count, enabling deeper penetration into the skin (approximately 0.5mm to 1.0mm or more, depending on the specific cartridge). Experienced Users: Individuals who have previous experience with microneedling and possess a higher tolerance may find greater benefit from a more stimulating treatment. Thicker Skin: Those with thicker skin types may require deeper penetration to attain their desired results. Deeper Concerns: Addressing deeper concerns such as wrinkles, scars, or stretch marks may benefit from the deeper microneedling provided by a 25-needle cartridge. Compatible SkinAct Pro Wireless Microneedling Pen With EMS & Light Therapy (SKU24714)