Cast Iron Dumbbell Set 15 kg, 25 mmSmall E Series Dumbbell Set 25 mm Cast Iron 15 kg Training with the E Series Dumbbell Set 25 mm Cast Iron 15 kg should be effective and sustainable! Whether you are looking for clearer muscle definition, more volume or strength training equipment is not complete without a versatile dumbbell. The sturdy steel bar and cast iron weight plates together weigh a maximum of 15 kg. This makes the dumbbell set useful basic equipment, and not just for men.