IUKL competition rule. Athlete Classification category.
Men's Youth/Junior tier kettlebell weights: Junior 1J / Youth I uses 20kg. Junior 2J / Youth II uses 16kg. Junior 3J / Youth III uses 12kg. Youth ranks are available for weight classes up to 85+kg only (not in the heavier adult classes 95/105/105+).
See the interactive comparison on KETTLEBELL MONSTER™ for filterable views and more detail.