How to choose: 1. Measure-Tie the wire with a rope and measure the length of a circle of the rope. 2. Count-diameter=length of the rope/3.14. For example, the measured rope length=75mm, and the diameter=75mm/3.14=23.9mm. suggest purchase size approx 24mm. How to use: fix one end first, then wrap the wires clockwise to make them tighten, cut off to the length you need finally. For split, organize and protect cables. Protect wires from wear and insulation, and can improve the beauty of bending. Easily and neatly put all messy wires into one cord. Widely used for TV, Theater, Computers, etc. Electrical Cable Sleeve Feature- The production material is PE new material, thickened material, wear-resistant, corrosion-resistant, good smooth, and gloss. Also, it is very flexible and easy to bend. Diameter: 2.2mm x 3mm / 0.09inch x 0.12inch (ID x OD).Length: 19M / 62.3ft (+/- 5%).