Plastic construction. Available in red color. 0.5 inches hole in the center. For pools, ski ropes, anchor lines and crab traps. Weighs 0.2 lbs.. A day of fun in water can be made safer and more fun with the Floats-Red. These floats are ultrasonically welded plastic floats. They can help new swimmers to stay afloat when they are tired. They can also be used for ski ropes, anchor lines, marker buoys and crab traps. These durable floats are 5 inches long and 3 inches in diameter. Its half inch hole is big enough to allow most of the ropes to pass through.