Sealey Dellonda Hot Tub Spa Heat Retaining Lid Inflatable 2-4 Person DL29
Model Number: DL29. Floats on top of the water to help maintain heat of water when not in use. Put the bladder onto the spa pool underneath the cover. Fits 2-4 Person Dellonda Hot Tub/Spas DL16 and DL23.