Compatible only with the FDA Cleared and Approved Velvet Microneedling Pen. *Pen not included in this purchase- only micro needle cartridges* These sterile, single-use 14 pin microneedling cartridges are extremely effective for microneedling treatments.  Each microneedling cartridge is EO (Ethylene Oxide) sterilized and individually packaged for single use only, ensuring the highest standards of hygiene and safety. The proprietary needle cartridge should not be re-sterilized or reused, maintaining the integrity and performance of each treatment. To prevent contamination, the Sollift device and needle cartridge are used with a non-sterile, disposable protective sleeve. This feature adds an extra layer of safety, keeping the device clean and sterile. Gauge: 32 BWG Roughness: <32 RMS Material: Medical grade stainless steel Sharpness: Radius specification within 0.005mm (max) Extension: Maximum needle extension is less than 2.3mm. Needle Depth: allows for incremental increase in settings of up to 2.0 mm to allow for the variability in thickness of healthy skin and acne scar tissue Products to Use With This  Rx Elysee Exosome Ampoule (PDRN 4ml x 2 and P198 2ml x 2) RX PDRN and Derma Science developed P198 Umbilical Exosome Stem Cell can be mixed for powerful skin rejuvenation and hair growth results. P198's active ingredient, GDF-11, promote cell regeneration and collagen production, which lead to a more youthful and healthy-looking complexion. GDF-11 helps reduce inflammation and improve skin barrier function.  Hop + Pilleo Growth Factor Solution 5ml x 5 Vials This revolutionary Growth Factor serum delivers epidermal growth factor, or EGF, into the skin with maximum penetration and efficacy to diminish apparent signs of aging, like wrinkles. EGF within the Hop + Pilleo Growth Factor Solution has been diligently refined as an essential skin care ingredient by modern medicine. Apply as a part of your regular skin routine or achieve enhanced results with microneedling. Zensa Numbing Cream Protective Sleeve