Specification Binding : Unknown Binding Brand : Top Chi Label : Top Chi Manufacturer : Top Chi MaterialType : Bamboo PackageDimensions_Weight : 0.46517537282 PackageDimensions : L:4.2519684996 X W:2.0866141711 X H:2.0472440924 ProductGroup : Health and Beauty ProductTypeName : HAND_STRENGTHENER Publisher : Top Chi Size : Medium 1.6 Inch SmallImage_Height : 75 SmallImage_URL : https://m.media-amazon.com/images/I/41bjqSTFdUS._SL75_.jpg SmallImage_Width : 75 Studio : Top Chi Title : Top Chi Skull and Bones Baoding Balls with Bamboo Stand. Chiming Chinese Health Balls for Hand Therapy, Exercise, and Stress Relief (Medium 1.6 Inch) Weight : 0.5 WeightUnit : pounds