The Body Solid(R) Rubber Hex 5-50 lbs Dumbbell Set features unbeatable durability. These solid cast iron dumbbells resist cracking and fading. The six-sided design prevents rolling and the rubber casing protects floors and equipment. FEATURES: Includes two of each: 5 lbs, 10 lbs, 15 lb, 20 lb, 25 lb, 30 lb, 35 lb, 40 lb, 45 lb, and 50 lb Solid cast iron construction Six-sided anti-roll design encased in virgin rubber Head securely fastened with unique pin mechanism Resists cracking and fading while protecting floors and equipment Model: SDRS550