Free standing Pro speed bag is PVC covered. The punch ball is foam filled and has a diameter of 8.7" .
The punch ball can be lowered to 50" and can be raised to a maximum of 63".
The flexible coil spring is chrome plated to prevent rusting and is 9mm x 90mm.
The base is made of plastic and should be filled with water or sand before use. When filled fully with water the base will weigh up to 135 lbs .