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Re: pic: 1028 practicing a little ruff
We haven't had any troubles with the balls popping yet, but maybe its because they are over-inflated? We made a frame to measure the balls with, and pumped them to exactly 13 inches. When pumped to 13 inches, the balls are very hard and rigid - one person stood on one and it didn't pop...but the ball that came with the kit is really light, and bounces less...
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