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.
The CoverMate II Understyle Cover Lifter is there for you when you need it and tucked away in the background while your hot tub is in use! It has two plates that slide easily underneath your hot tub. The cover lifter only requires 18 inches of clearance behind your spa.