This understyle bracket system allows the spa cover to rest lower against the spa for a less obstructed view. The bracket system slides underneath the spa. Black powder coated, rust-free construction with non-corrosive composite mounting brackets. The understyle bracket is perfect for plastic-skirted spas. The lifter only needs 18 inches of clearance behind the spa. The CoverMate 2 fits virtually any spa up to eight feet in width.