Diameter: 16 cm Weight: 320 g Technical features: separate internal air chamber; high grip; made of soft pvc and bounces with small exerted force; excellent shape that keeps it free from vibrations when thrown and rolled; latex free. Recommendations for use: The ball is intended to be used only and exclusively for training and rhythmic gymnastics competitions on FIG approved carpet; Avoid use on rubber or linoleum surfaces in order not to compromise in any way the technical and aesthetic characteristics; It is advisable to store it in your Pastorelli ball holder immediately after use; The company is not responsible for stains or dirt due to incorrect use or maintenance of the ball even if kept inside Pastorelli ball holder; In case of re-inflation, lubricate the needle to prevent the displacement of the valve. The ball construction involves the joining of the two hemispheres, which then may present a small line. This does not represent a factory defect.