Comprehensive Category 6 550MHz local area network cable utilizes 4 unshielded twisted pairs and solid (or stranded) bare copper 24 awg costruction. UL listing NEC,CMR/MPR. Nominal O.D. is 0.25 inches. Meets all requirements as set forth in the Telecommunications Industry Association's standard 568 & 570 recommendations.CM/CMG rated for single floor, general purpose use in walls and ceilings. Verified compliant with EIA/TIA standards by ETL. CSA listed.