Flex-O-Loc. Made of strong flexible corrosion-resistant aircraft cable with a patented ball-knob and socket that locks and unlocks easily. Nylon-coated cable in assorted colors: Clear black blue green red and yellow (cannot specify color). 4-3/4 inches long. WARNING: This product can expose you to chemicals such as Nickel which is known to the State of California to cause cancer andor birth defects or reproductive harm. For more information go to www.P65Warnings.ca.gov - Nickel (Metallic)