The ball for rhythmic gymnastics. Available in one model for practice and two models for competition (FIG approved). Ritmic: 280 g. training ball for rhythmic gymnastics Ritmic Official:400 gr. Approved by the FIG (International Federation of Gymnastics) an affordable model for practise and competition. Ritmic Competition:Similar to "Ritmic Official" but in different colours. Inflate with hand pump only. Keep needle wet, and insert perpendicularly.