Shop IRON COMPANY color coded competition kettlebells and sets by reputable manufacturers like RAGE Fitness. Competition kettlebells, no matter what weight, are all the same height and diameter and use the same colors and weight increments used by American Kettlebell Club and Girevoy Sport competitions. 4 kg. to 48 kg. sizes are available in singles or complete sets. Pick up a set of padded wrist guards to prevent discomfort and bruising during your workout.