Ocean Blue safety floats and lines separate the water in the shallow end from the deep portion of the pool. The float lines are secured to the wall where the bottom slope of your pool starts. Rope and floats are treated with chlorine inhibitors and ultraviolet stabilizers Floats are unbreakable polyethylene, sealed for optimal buoyancy Model 192016 Safety Float Line Kit Fits 16' Pool Includes: (5) 3” x 5” Floats, (1) Hook, (1) Fid and 3/8” Rope Model 192018 Safety Float Line Kit Fits 18' Pool Includes: (7) 3” x 5” Floats, (1) Hook, (1) Fid and 3/8” Rope Model 192020 Safety Float Line Kit Fits 20' Pool Includes: (9) 3” x 5” Floats, (1) Hook, (1) Fid and 3/8” Rope Model 192024 Safety Float Line Kit Fits 24' Pool Includes: (11) 3” x 5” Floats, (1) Hook, (1) Fid and 3/8” Rope