For HP 685 Refillable Ink Cartridge for HP Deskjet 3525 4615 4625 5525 6525 Printer Cartridges with Auto Reset Chips Advantages: 1.100% new and high quality 2. reasonable price to save your cost 3. Easy to install and use simply 4. With ARC chips, it can reset automatically when replacing the cartridges 5. Good for environmeantal protection 6. It can use repeatedly, it will save your cost and bring you more benefits Compatibility Printer: For HP Deskjet Ink Advantage 3525 For HP Deskjet Ink Advantage 4615 For HP Deskjet Ink Advantage 4625 For HP Deskjet Ink Advantage 5525 For HP Deskjet Ink Advantage 6525 Cartridge model: For HP 685 refillable ink cartridge with ARC Chips Color:1 Black 1 Cyan 1 Magenta 1 Yellow Please note: Please buy the ink catridge as same model number as that you are using in your printer. Otherwise, the ink cartridge should not work with your printer because different cartridge model is with different chip even the printer model number is same. It is a transparent cartridge that can be easily refilled through the refilling hole on the top of the cartridge. Simply remove the colored rubber plug, inject the ink into the hole until full, and then put the plug back in. Unlimited for Refill.