Our compatible HP PhotoSmart A636 ink cartridges are designed for user-friendly installation and deliver high-quality results with every page. To ensure the best printing experience, we engineer our ink cartridges based on the specifications of your original HP cartridges. As a part of our production process, these ink cartridges for HP PhotoSmart A636 printers are visually inspected and tested to ensure you receive a quality product with every order. We offer a 100% satisfaction guarantee with all printer ink and toner cartridges.