BV-Tech Cat6 Riser (CMR) 1000ft 23AWG 4 Pair Solid Bare Copper Cable. BV-Tech Cat6 Riser (CMR) bulk cable is ideal for use in a performance demanding high speed ethernet network or where future-proofing is desired. Besides, BV-Tech Cat6 Riser (CMR) bulk cable has UL listed certification and all other performance, energy environmental certification. The riser rated jacket is for use in between floors, in wall, and non-plenum spaces. Help fires from spreading floor to floor in vertical installations with mild flame retardance.