Reebok Fitness Gym Ball 55cm RAB-11015MG from Gaponez Sport Gear
Amazon.com: Reebok Gymball - 55cm Exercise Ball with Dual Textured Non-Slip Surface for Maximum Grip - for Core Workout, Improving Stability, and Posture at Home or The Gym - Pump Included -
Reebok Double Grip Medicine Ball - Functional Fitness Asia
Best Buy: Reebok 25-5/8" Stability Ball RE-05-55084
Reebok 75 cm PVC Exercise Ball, Black, Hand Pump Included - Walmart.com