in 2019, four US national records were broken with them, this year three more national and one world record fell!
See demonstrations here!
https://youtu.be/1wu5PVg6p1o
https://youtu.be/srllS3AMSr4
Please note that these products are shipped directly from the distributor. As such, they can't be combined with other orders here.
Approximate Weight: .9 lb.
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