Made of sturdy, high-density natural rubber, each wrist rebound ball measures 2.4 inches in diameter and weighs 0.2 pounds. The balls are attached to a 35-inch stretchable rope for players of any age. You can easily adjust the length of the cord by wrapping it around your wrist. Rebound balls are great for people of all ages and pets to spend their leisure time. They are great for senior wrist exercises, school activities, family events, birthday party favors, gift bag fillers and recreational sports. 1 location includes the shipping cost to US. Orders of 2, 000 pieces or greater are eligible for sea shipping. 100% guarantee for quality. Rush Service.