Effective in restoring health through taking this exercise. SpecificationProduct size: outside Diameter: φ6.8cm, Inside Diameter:φ3.2cm Product NW: 47gPoundage: 50pound, 40pound, 30pound, 20pound for your choiceColor: various colors (customed colors are also available ) Logo: inner arc can be printed Packing informationPacking:1pcs in OPP bag, 100pcs/carton Carton size: 27*34*53cm, NW:6.9kg, GW:7 ...