SOUTHWIRE's 56982101 TelcoFlex II Central Office power cable, #4 AWG, single conductor, Class 1 flexible strand without braid, LSZH, 600 V, green. Southwire's TelcoFlex II cable is a single conductor with a Class I (modified) bunched (#8 and #6 AWG) and rope-bunched (#4 AWG and larger) stranded tinned copper conforming to ASTM B-33 and Underwriter's Laboratories requirements. An opaque mylar tape shall be applied over the conductor to facilitate stripping. Insulation is 90 Deg. C rated low smoke, non-halogen, TelcoHyde(TM) 5221 conforming to Underwriter’s Laboratories standard 44 and Telcordia specification GR-347-CORE, also UL and CSA 105C AWM rated. The insulation has a limiting oxygen index of 35 percent.