Wired Home 1066Y Cat 6 CMR Solid Cond 500 MHz Blue 500 ft. Rated to 550 MHz-exceeding the performance of standard 250 MHz Cat 6 Central spline decreases noise and crosstalk Verified EIA/TIA 568B.2 and 10BASE-T, 100BASE-TX, 1000BASE-T, and 10GBASE-T compliant Sequential marks every two feet, shows cable remaining at-a-glance Spool-in-Box payout system virtually eliminates cable kinks