Vertical Jump Tester: Our vertical jump tester for children is equipped with an electronic counting device. It can count how many times your child jumps in one minute. It provides an opportunity to get kids interested in sports and encourage physical... more
Vertical Jump Tester: Our vertical jump tester for children is equipped with an electronic counting device. It can count how many times your child jumps in one minute. It provides an opportunity to get kids interested in sports and encourage physical... more
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