Clover Remanufactured Yellow Toner Cartridge for Color LJ 4600 4610 4650 (Alternative for HP C9721A 641A) (8000 Yield). Choose quality. Clover offers intelligently re-engineered replacement printing supplies that are top-rated in performance and dealer confidence. An industry leader in technology and innovation Clover affords you a true alternative to the OEM by offering a product with comparable quality and reliability. standard 2-year manufacturer’s warranty. ISO certified.