This is a compatible HP 31 Magenta inkjet ink bottle. This ink bottle is made to compare to the original in terms of both quality and page yield standards. This replacement ink bottle for HP 31 Magenta delivers first-rate quality and incredible value. The compatible with HP 31 Magenta ink ink bottle is manufactured under stringent quality control standards and is systematically inspected, disassembled, cleaned and refilled with 100% new ink which is made in the USA. Besides the exceptional printing quality, this HP 31 Magenta compatible inkjet ink bottle also gives you an economical alternative to buying expensive OEM (Genuine) HP inkjet ink bottles.