The Ricoh (407324) Photo Conductor Unit SP 4500 M906-17 is a genuine drum unit designed for Ricoh printers, specifically the SP 3600DN and SP 4510DN models. This unit is brand new, sealed, and made in Japan, ensuring high-quality performance. With a sleek black color and compatibility with various Ricoh series, this photo conductor unit is a reliable and essential component for maintaining your printer's functionality.