If you need a powerful dumbbell for intensive use, these round dumbbells are just what you need. With their cast-iron core, they're durable and virtually indestructible. Thanks to the different exercises you can perform with this type of dumbbell, the success of your workout is guaranteed. What do I need to know about the round dumbbell? The cast-iron core is surrounded by a thick rubber coating. This not only makes it extremely comfortable to use during your workouts, but also protects the floor of your Home Gym should the dumbbell fall from your hands. The dumbbell comes in black and red. This type of round dumbbell is available in a wide range of weights, from 2.5 kg to 40 kg. A price difference is applied to dumbbells from 35 kg upwards. Delivery for these weights is handled by UPS, guaranteeing optimum delivery for bulky or very heavy packages. We continue to make every effort to reduce the impact of delivery costs on our customers, while at the same time offering a partner they can trust.