CAP Barbell Standard Cast Iron 1-inch Weight Plates CONSTRUCTION  Made of solid cast iron and coated in a baked enamel finish to prevent chipping and peeling. The edges are grounded and the center hole is machined, ensuring a standardized product. FEATURES  Raised numbers help easily identify each weight size, adding efficiency to your workouts. VERSATILE  These weights are ideal for use during cardiovascular fitness and strength training. TRUST  Trust experience. CAP has been a pioneer in the fitness industry for over 30 years. Chances are, if you have ever worked out before, you have used a CAP product!