Compatibility: Compatible with HP GT51XL/GT53XL GT52 ink cartridges for HP Ink Tank printers 115, 310, 315, 319, 410, 415, 419, 500, 510, 515, 516, 520, 525, 529, 580, 581, 585, 589, 670, 675, 720, 750, 790, GT5810, GT5820, GT5821.- Ink Bottles: Set includes 4 refill ink bottles - Black (135ml), Cyan (70ml), Magenta (70ml), and Yellow (70ml).- Quality Ink: Premium quality ink formulated to provide vibrant colours and sharp text output.- Easy Refilling: Bottles have nozzles for easy and mess-free refilling of compatible ink cartridges.- Cost-Effective: Refill ink bottles offer an economical solution for printing compared to buying new cartridges.