Dr Pen Ultima A6S Cartridges1.The cartridge is locked the bayonet easily and firmly, the procedure will be more stable and high effeciency2.Fine 16 Needles,Fine diameter 0.18 mm is more compatible with skin texture, less pain and less trauma to make the skin recover soon3.Bayonet Slot -The connection of cartridge is with 3 locks designMore stable4.Extremely high absorption of any active ingredients.5.Recommend for: Acne Marks, Stretch Marks, Large Pores, Fat Lines Remove, Light Spots, Discoloration, Hydrating, Hyperpigmentation6. Almost all skin types can be treatedNOTICE1. This link only suit for Dr Pen Ultima A6S. It is includes replacements, the device is not included.2. The replacements are disposable items, please do not reuse.3. Please sterilize the replacements with alcohol before using.4. Remove the white plastic sanitary cover from the top of the cartridge before turn on the pen1.Model: For Dr.pen A6S2. Replacement Needle Type: 11/16/24/36/42/Round Nano3. Needle Material: Plastic and stainless steel4. Needle replacements are sterile and single wrapped.5.Dr Pen Type: Bayonet PortAdvantages of needles cartridge1. Does not destroy the structural integrity of the skin2. Gradually remove the skin deep toxins and waste3. Establish a direct transportation between skin and beauty product4. Promote the skin metabolism5. Improve the ability of wound6. No side effect, safe and reliable7. Simple operation8. Effect is more remarkable than the general beauty products9. Derma pen needle cartridge for micro needle is your choice for beauty and skin care treatments.