CAP Barbell 150 lb. Eco Dumbbell Set with Rack 5 to 25 lb dumbbells in 5 lb increments for a total of 150 lbs Dumbbells are made of cast iron. Includes a black 'A' frame dumbbell rack made of durable steel construction to keep your dumbbells organized Baked-enamel coating creates a protective barrier against rust, chipping, and dents.