Designed by Elgin, the oldest manufacturer of professional physical therapy exercise products. The Elgin Premium Burst-Resist Exercise Ball is chosen by therapists for its comfort, safety and durability. Elgin's Burst-Resist Balls come in 5 color-coded sizes ranging from 45cm/18" to 85cm/34". Burst-resistant ABS vinyl slowly deflates even when punctured (takes several minutes). Ideal for high risk clients, high performance workouts and for anyone who values safety in their therapeutic workout. Great for a multitude of stretches, beneficial exercises that develop and tone your arms, legs, abs and trunk muscles. Each ball comes with a 4-Color Exercise Chart, Plug & Adapter Kit. Latex Free. Made in the U.S.A. Bariatric Safe - 600 lb. Dynamic Load-Tested Weight Capacity The Elgin balls do not come with a pump.