An inexpensive alternative to buying a new cable. Use this adapter when you need to convertĀ a DB9 port to DB25 or vice versa. The molded design provides a solid connection, and each adapter is fully shielded against outside EMI/RFI interference. With its straight-through design, this adapter is 100% compatible with all serial devices. Connector 1: DB9 Male Connector 2: DB25 Female