Compatible Gestetner models: MP : C4000, C4501, C5000, C5501. . Compatible Lanier models: LD : LD540 C, LD550 C, LD645 C, LD655 C. . Compatible Ricoh models: Aficio MP : C4000, C4501, C5000, C5501. . Compatible Savin models: C4040, C5050, C9145, C9155...