The balls are made of durable rubber. The weight of the ball 260 - 400 grams depending on size. To pump up the ball is highly recommend a special pump firms of SASAKI, CHACOTT, or BLESK.
Gym ball SASAKI M-206 18,5 cm (LD)
Gym ball SASAKI M-206 18,5 cm (LYMY)
* — mandatory to order
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