Cord ID Pro is an all-in-one identification system of colored & numbered identifiers for professional installers. Design simplifies installing & maintaining cords & cables in residential, commercial & institutional environments while adding a professional look. System includes 100 gray identifiers, two sheets of 50 numbered inserts & two sheets of 50 numbered device stickers. To use, simply insert the label into the identifier. Snap it shut for security. Apply matching colored & numbered stickers on device. Colorful design of the reusable identifiers makes them highly visible. Identifiers provide a universal fit for cords from 1/8 (3.2mm) to 3/8" (9.5mm) thick. Durable identifiers are resistant to degradation. "