This pillow was used on Hydropool Self Cleaning Hot Tubs and Swim Spas between 2010-2015. It has a slot in the middle for the waterfall blade. The waterfall blade is required and not included. Hydropool Part #6050005.
Great product, super fast shipping. Will definitely order from here again.
Delivery was good. However product had a manufacturing flaw. Nevertheless, works OK and flaw not visible.
Very quick delivery and perfect replacement