Gym ring with strap high grade ABS plastic can hold 500kg 1,Material : high-grade ABS plastic2,Color : black3,Diameter outside diameter is 23.6cm,inside diameter is 18cm4,The max loading is 250kg5,The width of the belt is 2.3cm,the length is 40-50cm6,Advanced design keeps the rings stable,allows for quick mounting,easy adjustment and light weight