EASY ASSEMBLY: This replacement enclosure foam slides onto your existing enclosure poles for easy assembly. IMPROVED SAFETY: The replacement enclosure foam adds additional protection in case of any possible contact with the enclosure poles. INCREASED THICKNESS: The enclosure foam’s thickness makes it a superior option compared to the competitors. FOAM ONLY: This purchase includes 4 pieces of replacement enclosure foam only. Other trampoline parts are not included. This set of 4 replacement enclosure foam pieces is designed to add padding to the trampoline’s steel enclosure poles. Easily slip the enclosure foam back onto your trampoline’s enclosure poles to restore it back into its original condition.