This pillow was used on Hydropool Self Cleaning Hot Tubs and Swim Spas produced from 2000-2010. They have the slot in the middle for the waterfall blade which is required. New pillows do not come with the blade as these have to be purchased separate if required Part #6050005.
The new pillows a great and installation was quick and easy. Thanks
Perfect replacement for original on my 2008 Hydropool 775 self-cleaning spa.