FSCT2A-X: outdoor/single-mode/center tube/double armoured black/3000m/wooden spool FSCT2A-X: (X=4C,6C,8C,12C)Outdoor/Single-mode/Center tube/Double ArmouredBlack, 3000m/Wooden spoolFMCT2A-X:(X=4C,6C,8C,12C)Outdoor/Multi-mode/Center tube/Double ArmouredBlack, 3000m/Wooden spool1)suitable for ducts,aerial,direct buried.2)two-layer sheath for excellent crush-resistant performance.