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Title: Two balls and they both leak.
Review: AMZ was great in replacing the first ball we have that leaked air every day. However, the 2nd ball leaked air rapidly as well. In less than a week, my son has to have the ball pumped five times. We tried everything, pumped it up a bit more thinking the increased air pressure would close the valve a bit more, storing it in the kitchen where it's warmer reading how cold air affects the pressure e.g. No dice. It must be a bad batch of faulty valves but we're going for a more expensive and hopefully better ball this time.
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