SPIN: 14” powder coated new spinner wheel is the perfect new obstacle for your Ninjaline. VERSATILE: Can be used on tree or play structure as well as the Slackers Ninjaline. INCLUDES: Spinner wheel, 10" nylon UV resistant rope and delta safety carabiner. EXCLUSIVE: Smooth ball bearing system designed to spin longer than any other. FUN: Creates a fun challenge when using as an obstacle as you spin through the air and try and reach the next obstacle on the course.