Amazon.com: Live Infinitely Exercise Ball (55cm-95cm) Extra Thick Professional Grade Balance & Stability Ball- Anti Burst Tested Supports 2200lbs- Includes Hand Pump & Workout Guide Access : Sports & Outdoors
Body Sport® Fitness Balls with Pump – BodySport®
Amazon.com: THERABAND Exercise Ball, Professional Series Stability Ball with 55 cm Diameter for Athletes 5'1" to 5'6" Tall, Slow Deflate Fitness Ball for Improved Posture, Balance, Yoga, Pilates, Core, Red : Sports
Fitter International Inc. Exercise Ball Chair 55cm FBCJ55 from 4MD Medical
Stability Ball™ with pump - 55 cm (Black) for Pilates | Merrithew®
Halo® Trainer Stability Ball™ - 55 cm for Pilates | Merrithew®