Dynamax medicine balls range from 4 to 30 pounds. Different weights are better suited for different abilities and needs, so consider choosing several medicine balls to make sure all of your customers or clients have access to one they can work with. Durable casings are another great feature, as they will help your equipment stand up to repeated use. Racks available. Standard 14 inch diameter. Soft-shell construction and balanced, uniform weight of this ball make it easy to handle. Filler material provides even weight distribution and helps maintain shape. . Since 1986, Power Systems’ passion for fitness has been fueled by our customers. Power Systems is committed to ensuring people have the tools to lead active lives with professional-grade products, cutting-edge educational materials, and elite customer service. “Power Your Potential” is the philosophy that guides everything Power Systems stands for.