High School Boy's 1.6k 88% Brass Rim Weight Discus. Power Series - White/Gold High school boys high spin 88% brass rim weight professional grade track & field discus. 1.6k; 1.6 kilo; 1.6kg 88% brass rim weight. Brass rim is the preferred professional discus thrower choice. Brass rim discus thrown in the Olympics. Perfect for Advanced High School Elite Athlete 1.6 kilo Discus Throwers Power Series - Strength & Durability. Quality backed 2 year warranty.