CAT-5 E, STP (Shielded Twisted Pair), Stranded, Gray, 350Mhz, 1000 ft Spool. A shielded cable will retain a high quality signal when passing near / parallel to high voltage or power cables.CAT-5 E cables are used for networking, data transfer, and phone lines primarily. CAT-5 E cables can support 10 / 100 / 1000Mbps. With our spools you will need CAT-5 E / RJ45 connectors, our part # 31D0-51007 (shielded). Also you will need a crimping tool, our part # 91D5-56800. You may also want to use Strain Relief Boots, our part # SR-8P8C-BG (Blue), SR-8P8C-BK (Black), SR-8P8C-RD (Red), or SR-8P8C-XX (Beige).