SF Cable, 25ft DB9 M/F Null Modem Cable Null Modem DB9 Male to Female Molded 25ft - Connect two PC serial ports Type: Null Modem Serial Extension Cable / Connectors: DB9 Male, DB9 Female 28 AWG, 7 Conductors + Drain Wire / D-Sub 9 Pin Female w/Gold plating contacts Pin Out: 1,6-4 , 3-2, 2-3, 7-8, 8-7, 1,6-4, 5-5, 4-1,6 Fully shielded construction, and fully molded ends with 4/40 thumbscrews / Length: 25ft