STARTECH MXT1003MBK Straight Through DB9 RS232 Serial Cable - M/F, 3m, Black, Strain relief molding, Nickel plating, Jacket PVC (Polyvinyl Chloride), Cable Shield (Aluminum-Mylar Foil with Drain). The MXT1003MBK Black Serial Extension Cable (3m) features one DB9 male connector and one DB9 female connector, providing a high-quality extension for your RS232 serial devices, which enables you to position your peripheral devices as needed.