◆ Package: 1 gray/photo black, 1 magenta/cyan, 1 matte black/yellow (3 pcs, C9380A , C9383A, C9384A). The print head is packed with plastic bag. This professional packing method can fix the print heads well during multiple transportation to avoid damage or ink leak. ◆ Key material: HP72 printhead is remanufactured one, but the chip is new which is never used, so the function for our HP72 printhead is stable. Around 9ml of dye ink in printhead. ◆ Protection: red plastic cap and plastic film to protect the printhead nozzle, make sure printing smoothly. Finger and water can’t touch the chip, otherwise it is very easy to damage the printhead. ◆ Printing use for: engineering drawing, CAD drawing, photos, large size docs or label, big size picture, poster, map etc. ◆ Money and quality warranty: we will send warranty card with shipment. our defect rate is very low due to 2 times testing before shipping. However, if any defect, we make sure below warranty very honestly: 1) send good and new one to you as replacement, it is free; or 2) refund the payment to you fully 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


< Normal Printing Problem Solution:
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