1. Check whether you need an outside enclosure set (attaches to the outside of the trampoline) or an inside enclosure set.
  2. Count the legs on your trampoline. You can use one or two enclosure poles for each W-shaped leg support.
  3. Measure the diameter of the trampoline legs. Make sure the connectors in the replacement set you buy are the right size to fit onto the trampoline legs.