![[ So Sánh Sản Phẩm ]](http://theme.hstatic.net/200000456473/1001292290/14/policy_header_image_4.png?v=158){kind=small}
The JERK box is made of 20mm thick multi-layer panels that can withstand tremendous pressure as a way for athletes to focus on improving impact. Fitness boxes are available in four splits with heights of 6/15/30/38cm, with sturdy internal support for ultra-safe stacking, and stacked fitness boxes are most commonly used in weight training.
