YATUNINK 1 Pack Print Head Replacement For 4 Slot 564 564XL Printhead for Photosmart B110a B210a B109a C410a 510a Packing List: 1 Pack 4-Slot 564 Printhead + 4PK 564XL Ink Cartridge. ATTENTION: this is a remanufactured 4 slot print head, please make sure how many slots your old printhead has before the purchase. Compatibility List: Photosmart B8550 B8553 B8558 B110a B210a B109a C410a C510a D5460 D5463 D5468 D7560 C5324. Satisfaction Guaranted: We offer a 60-Day return/replacement policy on all products. If you have any issues with your purchase, please feel free to contact our customer service.