Original Replacement Cartridge - Authorized by dr pen to produce genuine, one-time use,do not share with others.
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New Design Cartridge - Wavy design, dust-proof cap,anti back-flow design, 3 slot design replacement cartridge.
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Upgraded Box - Layered design, lock design box, 8 pcs cartridges,dr pen a9, adapter, usb cable can be stored.
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