Overview: - Stimulates your dog's nose and mind - Prevents boredom and loneliness when you're away - Prevents unwanted destructive behavior due to boredom or anxiousness - Helps aid your dogs growth and development -The ball rolls with random movement stimulating your dog's senses and holding their attention for hours on end Specification: Material: safety plastic Size: Ball diameter 8.5cm Beaver 21cm Weight: 150g/pc Package Content: 1 x ball, 1x beaver Note: the color of the balls is random Note: Dimensional manual measurement has a deviation.