AAE's Discus Cage Swivel Gate Extensions feature 4" aluminum posts with an offset to prevent ricochet. The fully welded aluminum bases include inserts for structural cross frame members, and aluminum hinge fixtures with welded inserts allow easy installation and operation of swivel gate sections. The weather-treated nylon main safety net, with a 340 psi strength, can be cable-tied to the existing net and secured with rope cleats. Optional backup nets are available for added spectator safety. The extensions are sold as a pair, with the High School Model including (2) posts at 14' and (2) extension nets (14' x 10'), and the College Model with (2) posts at 20' and (2) extension nets (20' x 10').