The NCAA portable discus cage is fabricated from 2-1/2" (2-7/8" OD) schedule 40 aluminum pipe. Net poles have 33" rolled offsets and are mounted on heavy steel bases. Bases are fitted with two ball bearing wheels, which allow pole assemblies to be rocked back and easily moved. Once in position, four 5 gallon jugs, filled with water or sand, secure net poles in place. Cages employ weather treated nylon nets and vinyl coated steel net support cables to reduce net sag, ensuring maximum net height. Nets are secured to bases by replaceable shock absorbing bungee cords.