Features: Make of soft PU, comfortable,soft,and wear resistant; Rubber bladder provide excellent air and shape retention,heat resistant, no air leakage. Highly density nylons wrap of rubber bladder to maintain ball shape and elastics. The soft PU reduces arm pains during training while maintaining the stability of the volleyballs flight. Beach volleyballs adopts machine sewing technology,to ensure uniform sewing. It can used both indoor and outdoor, such as in school physical education classes, family gatherings, outdoor activity, allowing childrens to exercise in game. Specifications: Materials: PVC Color: Blue/1/Purple/Gray Purple Green/Gray Cyans Green/1 Blue color White/Green White Diameter: about 20cm/7.87inch Package Includes: 1pc Volleyballs note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.