There is adhesive on the back of the chip, which can be directly attached to the ink cartridges.
Can be used with your original cartridges, saving your printing cost.

Cartridge Number : For HP 831
OEM Part Number :
For HP 831 (CZ682A) BK
For HP 831 (CZ683A) C
For HP 831 (CZ684A) M
For HP 831 (CZ685A) Y
For HP 831 (CZ686A) LC
For HP 831 (CZ687A) LM
For HP 831 (CZ706A) Optimizer
Cartridge Color : BK / C / M / Y / LC / LM / OP
Chip Capacity : 775ml/pc
Chip Type : New version cartridge chip,stable quality and show ink level.
Advantage : One time use,Plug and Play
Warranty : 1:1 Replace Any Defective

For HP Latex 115 Printer (M0E30A)
For HP Latex 310 Printer (B4H69A)
For HP Latex 315 Printer (V7L46A)
For HP Latex 330 Printer (E2X76A)
For HP Latex 335 Printer (V7L47A)
For HP Latex 360 Printer (B4H70A)
For HP Latex 365 Printer (V8L39A)
For HP Latex 370 Printer (L4R41A)
For HP Latex 560 Printer (M0E29A)
For HP Latex 570 Printer (N2G70A)

1 Piece HP 831 Black Chip

1 Piece HP 831 Cyan Chip

1 Piece HP 831 Magenta Chip

1 Piece HP 831 Yellow Chip

1 Piece HP 831 Light Cyan Chip

1 Piece HP 831 Light Magenta Chip

1 Piece HP 831 Optimizer Chip