Handi-Lock Safety Pool Rope Float, 3"" x 5"" for 1/2"" Rope * Made of polyethylene and treated with chlorine inhibitors and ultraviolet stabilizers for durability and long life * Self locking feature fixes on line without additonal expense of float keepers or wedges * Three sealed compartments for optimum buoyancy in case of puncture * Three inside diameters to accommodate 3/8"", 1/2"", or 3/4"" rope (either hollow braid or twisted)