CommScope’s P3® product line is the industry standard by which all coaxial trunk and distribution cables are measured. P3 has been proven robust and reliable by years of successful installations. P3 500 is optimized for use in broadband feeder plants. Its small size, low attenuation and inherent strength has made it an industry standard. Standard P3 Construction A solid aluminum tube is precision swagged onto a high compression, micro-cellular foam dielectric core. The core contains a fully bonded copper clad center conductor.