The Nelco Challenger features plastic side plates and a 73 percent rim weight. This is an excellent choice for developing skills and for use in track and field meets. Featured in 1K, 1.6K and 2K class weights and meets official competition regulations. * Plastic plated discus 73% rim weight steel rim. Priced for general purposes practice or dual meet competition. N1104CC - 1K. N1104ABC - 1.6K. N1104AC - 2K