2, 4 & 6kg KP PRO Fitness Kettlebell Set in Durable Carrying/Storage Case KP Pro Fitness Kettlebell Set in Sturdy Storage/Portable Case. As made for home exercise, a set of kettlebells in weights of 2, 4 and 6 kg. Sufficient comfort will be provided by the wide and smooth handles. Kettlebells are made of high-quality cast iron material without welds with a durable vinyl coating that protects, for example, from damage to the floor. With weights of different weights, you can easily exercise the whole body. Material: cast iron