Verpeak 12kg (1,2,3kg x 2) Neoprene Dumbbell SetVP DB 139 AC VERPEAK Dumbbell Set Neoprene Weights, Anti Slip with Cast Iron Core, for Home Gym Fitness Weightlifting Toning? Set FEATURES Solid cast iron: Made of high quality cast iron core to strengthen durability, toughness, and stability. Firm Construction will not break or bend after repeated use. Easy to store: These dumbbell sets take up very little space and can be stacked anywhere without worrying about rolling due to their hex shape. Non