Kiefer Ring Buoy Throw Line, 30 Feet, 1/4-Inch Diameter Polyethylene Rope Throw line is 30 feet 1/4 inch is diameter polyethylene rope is lightweight, durable and will not rot Throw line includes a 3 x 5 inch Kiefer rotolock float for added buoyancy and retention Rescuer or lifeguard holds the throw line while tossing or dropping the ring buoy (sold separately) to a distressed swimmer For swimming assistance or true water rescue