Material: mail ball is nylon, shell is carbon steel.
Dimension: Please see the detailed dimensions from the left pictures.
Load Capacity: 175 lbs per unit, max. load capacity is 200 lbs per unit.
Net Weight: 0.71 lbs per unit
Application: It's better to be used indoor and smooth surface. Its noise is low and it can reduce scratches on objects. It's better not to impact them, because nylon is easy to be broken when it is impacted.