Plastic construction. Available in yellow color. 0.5 inches hole in the center. For pools, ski ropes, anchor lines and crab traps. Weighs 0.2 lbs.. Make your water excursions more fun and safer with the Floats-Yellow. These floats are ultrasonically welded plastic floats and help new swimmers to stay afloat when they are tired. These floats 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 and feature a half inch hole that comfortably allows most of the ropes to pass through.