Satisfactory after-sales: Rest assured with our commitment to excellence, as we offer a generous 24-month warranty on all ink cartridges and complimentary replacements for any defective cartridges. Shop confidently and elevate your printing experience with Valinkso!. Superior Printing Precision: Each Valinkso HP Ink 63 for HP Envy 4520 Ink Cartridges is subjected to meticulous quality assessments, guaranteeing sharp and vivid text and graphics to enhance the printing satisfaction of our valued customers. Latest Updated Chips: Our latest upgraded high-accuracy chip ensures flawless compatibility between Valinkso HP 63XL Ink Cartridge Combo Pack and your printer, guaranteeing seamless performance and optimal printing results. 63 Ink Cartridges for HP Printers:HP Envy 4520, 4521, 4522, 4523, 4524, 4525, 4526, 4527, 4528, 4510, 4511, 4512, 4513, 4516, 4517. 63 Ink Cartridges for HP Printers:HP DeskJet 1110, 1111, 1112, 1113, 1114, 2130, 2131, 2132, 2133, 2134, 2136, 2137, 2138, 3630, 3631, 3632, 3633, 3634, 3635, 3636, 3637, 3638, 3639, 3640. 63 Ink Cartridges for HP Printers:HP OfficeJet 3830, 3831, 3832, 3833, 3834, 3836, 4650, 4652, 4654, 4655, 4656, 4657, 4658, 5200, 5220, 5222, 5230, 5232, 5252, 5255, 5258, 5260, 5264. Package Contents: 1 PCS 63XL BLACK Ink Cartridge & 1 PCS 63XL COLOR Ink Cartridge. High Page Yield: 700 PAGES per HP 63XL Black Ink Cartridge, 450 PAGES per HP 63XL Color Ink Cartridges (5% coverage).