This 1000'-long spool of Plenum-Rated 25224B 18 AWG 2-Conductor Stranded Unshielded Cable from West Penn is suitable for audio, control, and low-voltage applications. Ideal for use by installers or home technicians alike. The plenum rating means that the cable is also suitable for use above drop ceilings, so you can run the cable hidden and out of sight. Inside the gray PVC jacket are two conductors, one with a red insulator and the other with a black insulator, so you can keep your connections ordered, even over a 1000' length.