Selected Qualification Material: Made of qualified TPR, soft spikes outside and hollow ball, wear-resistance, durable and flexibility to improve the play experience. Stress Relief Toy: The massage ball can promote the blood circulation of hand & fingers, make it become a simple and effective sensory functional toy, which can reduce your stress and anxiety throughout the day.Portable Toy: Portable size can be held & play ,easy to use, simply squeeze and release imitating massage movement, a useful therapy tool when you need to release your pressure,which is suitable for offices, churches, libraries, stations, special education classes, physiotherapy or educational purpose.Applicable for Various Person: Each ball is elastic and suitable for various hand sizes (adults and children), which is applicable for various people such as inattention, and autism which can well improve and assist daily relieve stress and irritability, and improve concentration.Material: TPRColor Option: Dark Blue/Gray/Light Blue/Orange/Pink/YellowNet Weight: approx. 30g/0.06 lbsPackage Includes: 1 x Fidget Ballnote: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.