This genuine/original Ricoh 407321 toner cartridge is compatible with Ricoh Aficio SP 4510DN and 4510SF printers. It yields up to 3000 pages and provides high-quality black prints using laser print technology. The cartridge is designed for use with Ricoh printers only and is perfect for those who need to produce high-quality black prints on a regular basis. The model number is M903-17, and the cartridge is suitable for use with Ricoh printers in the black color category.