Dr.pen M9 10-piece replacement cartridges with multi-specification needles

• Includes M8 multi-spec needle box: 3*18 needles / 3*36 needles / 2*42 needles / 2*round Nano needles. Fully covers all skincare needs and can be customized according to your treatment preferences. • The needles are made of medical-grade 304 stainless steel, with smooth and sharp tips. Micron-level needle precision paired with the M9's 0-2.5mm adjustable depth allows active serum ingredients to be delivered accurately into the dermis according to skin type and skincare needs for efficient absorption. Meanwhile, the needles cause minimal damage, speed up skin recovery, and greatly improve the skincare experience. • Special intelligent chip microneedle cartridges for Dr.pen M9, original accessories for the M9 smart electric microneedling device. Equipped with core embedded chip technology, they are precisely matched and exclusively compatible with the M9 device. Non-original cartridges cannot be recognized or used, ensuring safety and fitting accuracy from the source. • Each needle is individually packaged in a sterile sealed bag. Built-in anti-backflow valve prevents device contamination and skin irritation caused by serum backflow, and eliminates cross-infection from shared use. With 3-lock precise fastening structure, it installs firmly without wobbling, needles run smoothly, easy for beginners to operate. • IMPORTANT: Use each cartridge only ONCE. Always dispose of cartridges after use; they are NOT reusable. Repeated use of a cartridge may result in skin irritation and other negative side effects.