LxTek Remanufactured 63XL ink cartridges are recycled from the original 63XL ink cartridge and undergone a rigorous process of cleaning, restoration and refilling. Advantages for this Remanufactured Item: printing performance is almost the same as Genuine OEM ink cartridge at 1/2 of the price. Cartridges are refurbished by our own recycled technology, which provide you with user-friendly and superb printing experience. Exclusive high quality ink ensures lasting printing results. Convenient and cost-effective for daily use such as school, work, and home printing. Can be recognized by your printers and installed easily. Compatible with the following printers: HP Desk Jet printer: 1110, 1111, 1112, 2130, 2131, 2132, 2133, 2134, 2136, 3630, 3631, 3632, 3633, 3634, 3635, 3636, 3637. HP Envy printer: 4511, 4512, 4520, 4522, 4523, 4524, 4525, 4526, 4527, 4528, 4516. HP Office Jet printer: 3830, 3831, 3832, 3834, 4650, 4652, 4654, 4655, 4656, 4657, 4658, 5255, 5258. Package Included: 2 Pack LxTek Remanufactured HP 63XL ink cartridges (1 black | 1 tri-color) cartridge life: If you print about 30 pages of regular printing documents per week, cartridges will be run out in around 8 months. Please note: most of customers reflect that our products match perfectly with their printers and become our repeat customers For the excellent and economic ink cartridges. We are thrilled to receive such great reviews from those customers. Our goal is to ensure that everyone has a great experience with this product. Therefore, if you experience any issues whatsoever, please contact our customer service team via the Contact seller option on your order. We will Gladly assist you and address all your concerns.