Swim Foam Ring Inner Diameter: 58cm / 23 inch, Inner Diameter: 35cm / 13.7 inch.The life ring weight is 1.5kg.72cm / 28.3 inch, Inner Diameter: 44cm / 17.3 inch.The life ring weight is 2.5kg.Floating Lifesaving Rope is 98.4ft/ 30m Long, can be floating in the water and convenient to use. Life Preserver Ring with Rope: 23inch Life Preserver Ring,Bearing weight - 600kg / 1322lbs. 28inch Life Preserver Ring,Bearing weight - 800kg / 1763lbs Durable Safety Material: Life Ring Buoy is made of high-strength polyethylene, filled with polyurethane closed-cell foam, and the hard shell is strong and tear-resistant. The safety factor is higher than that of ordinary inflatable life buoys.The life buoys can withstand extreme weather, suitable for all kinds of ships and docks. Life ring buoy Applications: This foam ring buoy adds safety to any pool area. Its soft surface will withstand years of sun and weather.