Cover Valet NP509 Spa Cover Lift and Caddy New undermount-cabinet design works with all spas. Gas spring assisted for effortless spa cover removal. Stores cover conveniently to the side of your spa. Adjustable - raises or lowers spa cover when stored. Constructed of high-grade powder coated aluminum. Complete installation within minutes. Features an industry leading five year warranty. XL spacers included for spa covers with 6 - 4 tapers.