adidas speedball This artificial leather speedball from adidas is ideal for training coordination, speed and reaction time. It is suitable for all martial arts and for both beginners and advanced players. When training with a speedball, always use bandages or gloves to protect your hands. The ball is not delivered inflated and does not include a ball pump. Specifications: Color: black Material: polyurethane, EVA, polyester, nylon Dimensions: 17 x 25 cm (W x L) Size: M