The Ultimate Foundation for Core Strength and Stability. Used by elite physical therapists and top-tier trainers for decades, the Body-Solid Tools Exercise Stability Ball is the most versatile tool in your arsenal for building a rock-solid core, improving posture, and correcting muscle imbalances.Professional-Grade Durability: Forged with premium anti-burst construction, these balls are engineered to withstand high-intensity use in both busy commercial clinics and dedicated home gyms.Custom Fit for Maximum Results: Don’t settle for "one size fits all." Our color-coded sizing ensures you get the perfect diameter for your height, allowing for optimal form and spinal alignment.Limitless Versatility: Replace your office chair to improve active sitting, or use it to add a stability challenge to your chest presses, planks, and leg curls.Low Maintenance, High Performance: The easy-clean surface means you can transition from a sweaty workout back to your living space in seconds.---45 cm - Green55 cm - Grey65 cm - Red75 cm - Blue