Get down to the core components of fitness with the Fitness Gear(R) Premium Stability Ball. With 1,000 pound burst resistance, you're guaranteed safety in a Fitness Gear(R) product that can boost your stability and balance. The stability ball is known for enhancing core and secondary muscles, making it great for the athlete of any sport and level and ability. For variety, use with Fitness Gear(R) dumbbells, power tubes and aerobic bars. FEATURES: 1,000 pound burst resistance Dual action hand pump included Improves core muscles and secondary muscles Great for enhancing stability and balance Pairs well with Fitness Gear(R) Dumbbells, Power Tubes and Aerobic Bars Recommended User Height: 55 cm: 4'11" - 5'5"; 65 cm: 5'6" - 5'11"; 75 cm: 6' - 6'6" Fitness Gear California Proposition 65