Blue throwing Ball for traning/warming up made in plastic.Comes in weights from 200g to 2,5 kg Excellent traning equipment for those who want to train technique without the strain on elbow/shoulder as you would get with a javelin.200 grams - Best suitable for children and the inexperienced. 6cm diameter300 grams - Best suitable for children and the inexperienced. 6,5cm diameter400 grams - Best suitable for children and the inexperienced. 7cm diameter500 grams - Best suitable for both the inexperienced and experienced javelin throwers. 8cm diameter600 grams - Best suitable for both the inexperienced and experienced javelin throwers. 8cm diameter700 grams - Best suitable for both the inexperienced and experienced javelin throwers. 8cm diameter800 grams - Best suitable for both the inexperienced and experienced javelin throwers. 8cm diameter900 grams - Best suitable for both the inexperienced and experienced javelin throwers. 8,5cm diameter1,0kg - Best suitable for both the inexperienced and experienced javelin throwers. 10cm diameter1,2kg - Best suitable for experienced javelin throwers. Not recomended for children. 11cm diameter1,5kg - Lämpar sig bäst för erfarna kastare som vill träna med högre vikter. Rekomenderas ej för barn som träningsredskap. 11cm diameter1,75kg - Best suitable for experienced javelin throwers. Not recomended for children. 11,5cm diameter2,0kg - Best suitable for experienced javelin throwers. Not recomended for children. 12cm diameter2,5kg - Best suitable for experienced javelin throwers. Not recomended for children. 12,5cm diameter