Package Included:
1xgray/photo black, 1xcyan/magenta, 1xmatte black/yellow ( 1 G/PK, 1 MC , 1 MK/Y) , C9380A / C9383A / C9384A, 3 pcs

100% compatible with the following printers:
. HP Designjet T610 T620 T770 T790 T1100 T1120 1200 T1300 T2300

1. My printer reports "The following print head has a problem" or any error message, how do we process the next step?
LKB Answer: Just skip the message, and press "OK" or "Continue" and go on printing.
2. My printer did not recognize the print head, how do we do?
LKB Answer: ① please take off print heads, use eraser to clean the chips softly and tissue paper to clean the metal touch pot softly(can't finger touch), and then re-install the print head; Or ②You can use a knife to tear off the remanufactured print head chip, and then use the double-side tape to paste the original chip.
3. My printer hasn't printed for a long time, now the printer report shows that the print head has a problem, how do we do?
LKB Answer: Your printer at least needs to print 1~2 pages twice a week.
4. If the ink in the cartridge is dye ink, can I change the dye ink to pigment ink?
LKB Answer: No, can't.

Warranty Card:
We will send a Warranty Card to you with shipment. We stated below on the card:
◆ Money Back Rule in case any defect;
◆ Normal Printing Problem Solution.

Note:
1. Our print head is remanufactured, not original one, Non OEM value-save more for you;
2. When you replace the print head, please do Printer Head Cleaning 2~3 times every time.

How to contact with us (3 Months Money Back Warranty):
Product listing > Click Sold by Titlebaum> Choose the option Ask a question
Log into Your Account > Click Your Account > Your Order > Find your order and click Contact Seller