Genuine 20-pack 12-pin (0.25mm) bayonet slot replacement cartridges for Dr. Pen Ultima A10.
Individually packaged: Each cartridge is individually sealed in sterile packaging.
Important: Use each ink cartridge only once. Always discard ink cartridges after use; they are not reusable.
Easy to install: Take out the ink cartridge from the sterilization package, insert the standard round groove into the slot of the machine, push the ink cartridge horizontally to the bottom, turn the box counterclockwise, and lock the box.