Multi-Functional Figure-8 Wrist Strengthener Multi-Functional Arm Strengthener Grip Strengthener Enhanced Version Note: This product is genuine The product comes in five strength specifications: 5KG, 10KG, 15KG, 20KG, and 30KG, suitable for people of different ages and strength needs. Match different intensities for strength training, fitness exercises, etc. 【Detailed Specifications】 Product size: length 41.5CM * width 22CM * height 3.5CM Net weight of product: 0.85KG Material: Shell ABS, NBR (foam), spring steel core Color: Black shell (handle foam color available in multiple options) Packaging method: Single color box packaging, 20 pieces per outer carton Outer box size: 43*40.5*46.5cm Gross/Net Weight: 20.5/19.5kg