C2G 52165 Serial RS232 DB9 Null Modem Cable with Low Profile Connectors M/M, In-Wall CMG-Rated, Black (3 Feet, 0.91 Meters) Cmg-rated cables meet with many NEC requirements for communications cables Low-profile connectors (1.25 in total depth) save valuable space in the gang box Specifically designed to support RS-232/serial communications Fully shielded to prevent unwanted EMI/RFI interference