This Cat 6 unshielded twisted pair ( utp ) plenum ethernet cable is suitable for 550 MHz high speed applications. This cable is designed for indoor network installations and is listed by ETL. This cable is type CMP and can be installed in air plenums and roof ducts in accordance with NEC Article 800. The wires are 23 awg in size and are made of solid bare copper conductors. All 4 pairs are easily identified by color stripes. This cable is supplied in 1000 ft pull box and sequential length markings are printed on the jacket. This product is made in the USA.