PRODUCT ATTRIBUTES — Size:width 1.4'', height 1.8'' Including: 2 balls (One pair) Product total (about) weight:170g Color: light green Because of manual measurement, the size will be a little error, please understanding. PRODUCT MATERIAL — Made of marble. There is a slight difference in the color and texture of the natural stone. HEALTH BALL —The ball is elliptical, the color is beautiful, the feeling is cold, the health effect is very good. PRODUCT BENEFIT — Can play on hand, can move finger joint, long time exercise also can eliminate fatigue, strengthen memory, relax. PRODUCT USAGE —It can be used to paint various patterns, to make full use of the imagination space, to exercise children's hands and minds ability, also can be put into fish tank, is a nice decoration. PRODUCT ATTRIBUTES — Size:width 1.4'', height 1.8'' Including: 2 balls (One pair) Product total (about) weight:170g Color: light green Because of manual measurement, the size will be a little error, please understanding. PRODUCT MATERIAL — Made of marble. There is a slight difference in the color and texture of the natural stone. HEALTH BALL —The ball is elliptical, the color is beautiful, the feeling is cold, the health effect is very good. PRODUCT BENEFIT — Can play on hand, can move finger joint, long time exercise also can eliminate fatigue, strengthen memory, relax. PRODUCT USAGE —It can be used to paint various patterns, to make full use of the imagination space, to exercise children's hands and minds ability, also can be put into fish tank, is a nice decoration. Dear friends,we are grateful for your choice.If you have any questions or suggestions, please contact me at any time.