Type C4 Series drum is designed for use with Oki C7350hdn, C7350n, C7550hdn, C7550n, C7300, C7300N, C7300DXN, C7500N, C7500DXN, C7100, C7100n, C7300 Color, C7300n, C7300dxn, C7500n and C7500dxn. Yields up to 30,000 pages.