Designed for precision and hygiene, 14 Pin Replacement Cartridges for the Dr. Pen® A11 Professional Series Microneedling Pen are sterile, individually packaged cartridges that ensure optimal skin penetration and enhanced serum absorption for professional-quality results. These cartridges boost collagen production, reduce fine lines, and improve skin texture. The 14 14-pin cartridges are easy to install and allow you to make any skincare routine safer, smoother, and more effective with every use.