... inside? (for water walking balls)A: 15-20 minutes, just change the air inside the ball at least every 30 minutes ... . We can make Transparent zorbs, Colorful zorbs, Color dot zorbs, Color Entrance zorbs, Color string zorbs, Aqua zorbs, Zipper zorbs, Glow zorbs, Nuclear zorbs ... are CE, UL and GS approved in 110v-120v or 220v-240v with various kinds of plugs. 8. Loading capacity: 200 kgs9 ...