Construction – Made of solid cast iron with a machined center hole and a gray, baked enamel coating; These Olympic weight plates have a 2 inch center hole to accommodate Olympic barsFeatures –The gray baked enamel coating ensures a durable, reliable weight that will last through grueling workouts; Raised silver numbers help to easily identify weight sizeVersatile – Weight plates can be used to perform muscle strengthening exercises and endurance training, and to increase flexibility and balance; A single weight plate can also be used for warm up exercisesChoices – These weights are available in 2.5, 5, 10, 25, 35, 45 and 100 poundsTrust – Trust experience; CAP has been a pioneer in the fitness industry for over 30 years with locations worldwide; Chances are, if you have ever worked out before you have used a CAP product