Isokinetics Inc. Brand Peanut Ball - 4 Multiple Color Choices - For Exercise and Physical Therapy Peanut balls are uni-directional, only moving back and forth, versus multi-directional as with regular round exercise balls, providing more stability and control Made of heavier weight (compared to low cost brands), strong latex-free material designed not to burst if punctured. Grooved surface for better grip INCLUDED: Inflation Instructions, Warranty and Contact sheets, Ball Plug, threaded Inflation Nozzle. NOT INCLUDED: air pump, exercise guide . Clinic packaging (in polybag, not retail box) Pump not included (takes a lot of air, so we recommend a high volume air pump, like our Isokinetics Exercise Ball Air Pump) Many of our dog owner customers report these work well for canine rehab and agility exercises