The CAP Cast Iron Weight Plates come in a variety of sizes to let you customize your workout. Each CAP Olympic Plate features smooth edges and an extra rib for more support. These plates are ideal for cardiovascular fitness and strength training. CAP Olympic Plates are made of solid cast iron for strength and durability you can count on. Whether you're just starting with weightlifting or are an experienced athlete, these weight plates can help you train to meet your personal fitness goals.