GadKo Null Modem Cable, DB9 Female to DB25 Male, UL rated, 8 Conductor, 6 foot GadKo is the only authorized dealer of GadKo branded products. This 6ft DB9 Female to DB25 Male null modem cable is usually used to transfer data from one PC directly to another PC and features molded connectors and gold-plated contacts for optimal signal transfer.