Thera-Band® Exercise Balls These are inflatable exercise balls used to strengthen and tone abdominal, back, chest, arms, thighs, legs and buttocks. They maximize stretching, increase flexibility, and improve balance and coordination, help to develop heightened sensory motor skills, improve balance and trunk stability, and provide many other physical benefits. Each exercise ball comes with two plugs and an inflation adapter, along with the Thera-Band Exercise Ball Guide poster detailing 24 exercises. Features:Yellow ball has a 45 cm diameter and is intended for people with heights of 4'7" - 5'0"Supports up to 1000 pounds when properly inflated. Constructed of high-quality vinyl with latitudinal ribs for easier grasping. Contains no latex. Suggested Accessory: Thera-Band Power Pump to make filling your exercise ball much easier!