The WIR6CMRBL 1000 ft Cat6 Riser Bulk Cable roll (blue) meets or exceeds all Category 6 specifications to ensure reliable Gigabit network connections, and features a foot-marked jacket that makes it easy to tell how much cable is left on the roll and enables you to measure your cable runs to your exact installation requirements. Constructed of only top quality materials, the WIR6CMRBL delivers reliable performance and is backed by our Lifetime Warranty. This Category 6 cable has been tested for CMR riser installations, and is ideal for in-wall, between floor and elevator shaft cable runs where CMR fire rating is required. StarTech.com Cat6 cables are manufactured using high-quality copper conductors. While many cable manufacturers offer a cheaper cable, based on a copper-coated aluminium core, we make no compromises on quality to ensure you receive top value and performance for your network cable investment. This Cat6 cable is constructed with 23 gauge copper wire, to support a broad range of Ethernet applications such as Power over Ethernet (PoE). Because we use a high quality copper wire, our cables easily sustain the power required for Power over Ethernet applications, whereas the inferior quality offered by copper-coated aluminium cables may be subject to insufficient power delivery, heat build-up, equipment damage and potentially, fire.