10/50pcs Screw Slot Micro Needle Pen Electric Derma Pen 9pin /12pin /36pin /nano/3D Needles Cartridges for Face Skin Hair Growth

10/50pcs Screw Slot Micro Needle Pen Electric Derma Pen 9pin /12pin /36pin /nano/3D Needles Cartridges for Face Skin Hair Growth Suitable for Derma Pen 1. Type: Screw Slot You just need to replace the cartridge when you are finished using it, which is very convenient to use. 2. 11 types pin needle Cartridges These 10/50pcs 12pin/36pin/nano pin/3D head/42pin/7pin/3pin/5pin/1pin/24pin/9pin cartridges are disposable replacement parts. It is more economical, you only need to replace the cartridge after each use. 3. One Time Use The replacement cartridge is single use, please do not use them with others. You can take out a new one before each use. If you opened or used the cartridge, it is not returnable (except for quality problems). you can change the different cartridges depending on your demand. 4. Safe Design These cartridges are individually sealed and packaged for optimal safety and comfort. 5. Easy to Carry The individually packaged cartridge design can be conveniently p