SeaKing Stores › 6ft Gen 2 RGB extension cable - RGB-6 6ft Gen 2 RGB extension cable - RGB-6 £26.00 6ft Gen 2 RGB extension cable - RGB-6. 6 ft Color Optix Gen-2 Extension Cable; part of Gen-2 Color Optix wiring/control ecosystem. 6 ft. Add To Cart Added! 6ft Gen 2 RGB extension cable - RGB-6. 6 ft Color Optix Gen-2 Extension Cable; part of Gen-2 Color Optix wiring/control ecosystem. 6 ft.