18 Gauge wire: 18/2 cable rated CL2 for in-wall use, complies with fire safety for use inside the walls. This 18 gauge cable comes wrapped around a hard plastic spool that makes dispensing convenient. Each color is 100FT, easy cut, it's easy to strip and cut into any length based on needs. Advantage of Copper clad aluminum: Here are the facts about CCA vs OFC. CCA wire offers the same signal frequency and reliability in terms of corrosion resistance to copper wire. The advantage of the CCA wire is lighter and more flexible than copper wire. The cost of CCA vs Oxygen free copper is much lower and you can enjoy the same functions and reliability as copper wire without paying the extra cost for the installation. Perfect jacket: Tough, yet flexible white insulated jacket is color coded for polarity. Each conductor has an individual, color-coded jacket enclosed within the outer white CL2 jacket, making it safe for use within the walls of residential class buildings. Applicable t