This is the H2X Shaft Pin with SKU number X400130 and is one element that goes with the Blade Prop Kit. The H2X Shaft pin is a prop shaft pin and is a component of the wave propulsion.
The hydraulic shock is used to support your CoverMate III cover shelf. Easily open and close the hot tub cover with the use of the hydraulic shock that will support the weight of the cover with ease.