Description: replacement duplex module kit.Compatible Part #'s: CN459-60375Compatible Models:HP OfficeJet X451DN, X451DW, X476DN, X476DW, X551DW, X576DW PrintersHP PageWide Managed P55250DW, P57750DW PrintersHP PageWide Pro 452DN, 452DW, 477DN, 477DW, 522DW, 577DW, 577Z Printers Buy with Confidence: The duplex module comes with 90 days warranty. For any reason you're not completely satisfied, please contact us for a replacement or full refund. Disclaimer: This is not a HP OEM product .Any use of the HP brand name or model designation for this product is made solely for purposes of demonstrating compatibility.