Red Sonic Track and Field 1 k Girl's High School Discus. 1 kg girls top selling beginning/intermediate discus. IAAF, NCAA & NHS certified for all levels of competition. 1 year warranty. Premium 1 Kilo women's discus High quality 80% Steel rim weight (reduced wobble/self correcting flight builds confidence) Perfect implement for beginning and intermediate throwers Give your athelete the opportunity to perform at their best Beginner throwers and practice 1.6 k, 1.6 kilo, 1.6 kg