Make Power-over-Ethernet-capable Gigabit network connections in applications requiring CMR-rated cable. The WIR6CMRBL 1000 ft Cat 6 Riser Bulk Cable roll (blue) meets or exceeds all Category 6 specifications to ensure reliable Gigabit network connections, & features a foot-marked jacket that makes it easy to tell how much cable is left on the roll & enables you to measure your cable runs to your exact installation requirements. Constructed of only finest top quality materials, the WIR6CMRBL delivers reliable performance. This Category 6 cable has been tested for CMR riser installations, & is ideal for in-wall, between floor & elevator shaft cable runs where CMR fire rating is required. Star Tech.com Cat 6 cables are manufactured using high-quality copper conductors. While many cable manufacturers offer a "cheaper" cable, based on a copper-coated aluminum core, Star Tech.com makes no compromises on quality to ensure you receive top value & performance for your network cable investment. This Cat 6 cable is constructed with 23 gauge copper wire, to support a broad range of Ethernet applications such as Power over Ethernet (Po E). Because Star Tech.com uses a high quality copper wire, these cables easily sustain the power required for Power over Ethernet applications, whereas the inferior quality offered by copper-coated aluminum cables may be subject to insufficient power delivery, heat buildup, equipment damage & potentially, fire.