SeaKing Stores › 16ft Gen 2 RGB extension cable - RGB-16 16ft Gen 2 RGB extension cable - RGB-16 £35.00 16ft Gen 2 RGB extension cable - RGB-16. 16 ft Color Optix Gen-2 Extension Cable; part of Gen-2 Color Optix wiring/control ecosystem. 16 ft. Add To Cart Added! 16ft Gen 2 RGB extension cable - RGB-16. 16 ft Color Optix Gen-2 Extension Cable; part of Gen-2 Color Optix wiring/control ecosystem. 16 ft.