Pair. SunLift™ is a reflector suspension system which allows you to adjust the height of a hood in one simple movement. The tension mechanism will keep the hood in place once it is set at the desired height. The support strings pull out and retract like a yo-yo. A pair of SunLifts can support up to 22 lbs. Finally a simple way to raise a hood as plants grow! Features a Japanese made stainless steel, heavy duty spring. Maximum extension length is 4½ feet.