Our product is compatible with Ricoh OEM code: RISP400DR 408059 and is designed to work on the printers listed below: Brand: Ricoh Compatible printers: SPSP 400 DNSP 450 DN Color: Black Duration: 20,000 A4 pages calculated according to ISO/IEC 19798 standards, i.e. with an average coverage of 5% - When printing photographs or backgrounds with high coverage, or full page, the number of pages actually printed will be smaller because a quantity of toner greater than 5% will go on the pages. OEM Code: RISP400DR 408059 EAN Code: Not available. This is not an original product. Our consumables are CE, ISO 9001 or ROHS certified. For any problem contact Technical Support +39 327 227 6456 - We will replace the defective product or refund the order up to 36 months from purchase. We provide free technical support on the operation of your printer, even for problems not caused by our product. We do not abandon our customers.