This is an official Lay-Z-Spa Inflatable Lid, specifically designed as a replacement for punctured or damaged lids on Lay-Z-Spa Vegas or Lay-Z-Spa Saint Tropez models. Please note that the lid will initially be a smaller diameter than your hot tub, as it is designed to expand over several weeks to fit snugly. The initial inflated diameter is approximately 147.5 cm. The lid requires a couple of days to expand to the same size as your old inflatable lid.