INKMATE 1 PACK 564 Printhead Replacement for 564 Printhead B110a B210a B109a C410a (4-Slot) Packing List: 1 Pack 4-Slot 564 Printhead ( B110a B210a B109a C410a) High quality printhead with 4 slot Compatibility List: Photosmart 5510, 5511, 5512, 5514, 5515, 5522, 5525, 6510, 6512, 6515, 6525, 7510, 7515, 7525, 5510-B111a, 5511-B111j, 5512-B111a, 5514-B111h, 5515-B111a, 6510-B211a, 6512-B111a, 6515-B211a, 7510-C311a, 7515-C311a, Plus-B209a, Plus-B210a, Plus-B210b, Plus-B210c, Plus-B210d, Plus-B210ae, Photosmart eStation C510a Compatibility List:HP C5324, C5370, C5373, C5380, C5383, C5388, C5390, C5391, C5392, C5393, C6324, C6340, C6350, C6375, C6380, B109a, B109n, B110a, B110c, B8550, Deskjet Printers 3521, 3522, 3526, 3070A. Officejet Printers 4610, 4620, 4622 Our vows: we can provide a guarantee to every customers who purchased our products, once there are any problems, we will make all our efforts to help you and if you don't want to posses it , we can offer you the full refund.