Weight: 400 g. Sport-Thieme Javelin Throw Ball Outdoor: For competition preparation. With the Sport-Thieme Outdoor Javelin Throw Ball, athletes can optimally prepare for javelin competitions. To best match your training level, various weight options are available in 400 g, 600 g, and 800 g. Thanks to its small diameter, each ball can be easily gripped. This training device is specifically designed for outdoor use. It is particularly suitable for series throws and throws on facilities where javelins cannot be used, making the cast iron ball a great choice. Product details: Material: Cast iron, 400 g ball diameter: 48 mm, 600 g ball diameter: 55 mm, 800 g ball diameter: 60 mm, Weight: 400, 600, and 800 g, Color: Beige. Application area: Outdoor, Area of use: Methodology.