Abyss 1k Men and Women 85% Rim Weight Discus. IAAF Certified Excellence. Power Series - Black Women and men 1k track & field discus. 85% stainless steel rim weight 1 kilo track & field discus 1k; 1 kilo; 1kg IAAF certified high spin 85% stainless steel rim weight 1 kg track & field discus Perfect for Intermediate to Advance Throwers Power Series - Strength & Durability w/ high grade steel rim