This came from the My Little SnugaMonkey™ Deluxe Newborn Rock 'n Play Sleeper (Target) Foldable Rocker, though it will work for some other Rock n Play models too.   Listing is for parts only as shown, nothing else is included.  Good condition.  If you don't need all 4 (2 arms 2 legs), message me and I can create a custom listing for you for what you need.  From a non-smoking and pet-free home.