Speed Ball Platform Set Bracket Swivel Punch Bag - 90368, This speed ball platform provides a great training aid for MMA, boxing, martial arts and so much more. The wooden platform can be held in place onto the wall using the metal bracket. The set comes with 2 wall brackets which allow you to affix the platform at any desired height on the wall. The bracket is made from high quality, powder coated metal that is rust and scratch resistant. The set also comes with all the bolts and nuts necessary for installation. The platform is made from 0.7" MDF which is easy to clean and waterproof. The ball is made from PVC and is laminated inside with several layers of cloth to give it weight and strength. The ball has a rubber bladder inside which is inflated with a standard football pump to keep the shape.