1.HPP81:
C4930A 680ML/C4931A /680MLC4932A 680ML/C4933A 680ML/C4934A 680ML/C4935A 680ML
2.1.HPP81:
C4940A 680ML/C4941A /680MLC4942A 680ML/C4943A 680ML/C4944A 680ML/C4945A 680ML

Usage Method
1. Install it as the normal way
2. Pls do not install three sets cartridge continuously , if need to replace it , pls closed the power then intall it again
3.When filling the ink, pls try your best to use identical ink which comes from the same company

Advantages
No break the printer, no replace the cartridge , saving the cost greatly.And its materies is P.P , it resists caustic substance and be suitable for series of ink ,such as dye, pigment,UV, solvent, sublimation ink