Replacement lines for the Sensor 4 Control bar. Standard lines are for the standard Sensor 4 and are color coded white and yellow. Tectanium lines are for the Sensor 4 PRO control bar and are dark grey. Core Sensor 4 2M Back Lines | Part #2A (SKU: 684811525060) Core Sensor 4 2M Front Lines | Part #3A (SKU: 684811525077) Core Sensor 4 4M Back Lines | Part #2B (SKU: 684811525084) Core Sensor 4 4M Front Lines | Part #3B (SKU: 684811525091) Core Sensor 4 18M Back Lines | Part #2C (SKU: 684811525107) Core Sensor 4 18M Front Lines | Part #3C (SKU: 684811525114) Core Sensor 4 18M Tectanium Front Lines | Part #3C (SKU: 684811525176) Core Sensor 4 18M Tectanium Back Lines | Part #2C (SKU: 684811525169) Core Sensor 4 4M Tectanium Front Lines | Part #3B (SKU: 684811525152) Core Sensor 4 4M Tectanium Back Lines | Part #2B (SKU: 684811525145) Core Sensor 4 2M Tectanium Front Lines | Part #3A (SKU: 684811525138) Core Sensor 4 2M Tectanium Back Lines | Part #2A (SKU: 684811525121)