Gym Ball
GYM
Material：PVC or Non-P (Phthalate-free PVC)
Specification：
Item No. Specification
GYM18 Dia. :  45 cm ( 18'' )
GYM22 Dia. :  55 cm ( 22'' )
GYM26 Dia. :  65 cm ( 26'' )
GYM30 Dia. :  75 cm ( 30'' )
GYM33 Dia. :  85 cm ( 33'' )
GYM40 Dia. :  100 cm ( 40'' )  
Product Features

Exercising with the Gym Ball ( swiss ball; fitness ball ) is an important part of fitness and rehabilitation training programs.
 
Gym Ball is great for all aerobic workouts including back stabilization, exercises to improve balance, flexibility, dynamic stabilization, strength, posture, and general coordination, and fit for all ages and fitness levels.