IUKL competition rule. Athlete Classification category.
Women's Professional tier kettlebell weights: MSIC / Professional I uses 24kg for Biathlon and Snatch, 28kg for Long Cycle. MS / Professional II uses 24kg. CMS / Professional III uses 20kg. Professional ranks are available from 53kg weight class and above (some start at 58kg depending on discipline).
See the interactive comparison on KETTLEBELL MONSTER™ for filterable views and more detail.