Shroud Nacra 17 w/ turnbuckle, is a single shroud for the Nacra 17. The race shroud is provided with aturnbuckle endfitting. The length of the shroud for a Nacra 17 MKI and the Nacra 17 is the same. Only the endfitting is different. When you are looking for a set of shrouds, ordering two pieces is necessary.