Min. Order Reference FOB Price
1 Set US$100.00-200.00 / Set
Product Description
Product Description To measure initial length and extended constant K of YO-YO balls, to determine whether the extended ropes of balls have the neck injury hazard or not. Steel ruler, graduated scale and weights are included. Standard EN 71-1 part 8.37; ISO 8124-1-2018 clause 5.38 Product ...