The Pritop 21 xl ink cartridge [Pack of 2 inkjet cartridge ] for HP Deskjet D1360, D1460, D1550, D1560, D2360, D2460, 3920, 3940 Printers HP Deskjet F370, F380, F2120, F2179, F2180, F2235, F2275, F2276, F2280, F4185 All-in-Ones HP PSC 1402, 1410 All-in-Ones HP Officejet 4355 All-in-One is based on Inkjet printing technology, the cartridge ensures good quality prints every time. The pritop ink cartridge is designed to produce superior quality prints. If you are using 21 ink cartridges, you are sure to get sharper and bold prints, so it is also useful for commercial establishments that require professional quality prints. Each new cartridge 21xl has 20ml ink. Once you install it in your printer, it will last you longer or you can even use it as a replacement for your old printer cartridge. Easy to install, just shake, remove the seal properly and install it. Our product is tested before delivery. Please dont cancel your order after placing it.