Sun Lift 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. Finally, a simple way to raise a hood as plants grow. Features a Japanese made stainless steel, heavy duty spring. Don't be fooled by cheap knock-offs. They are simply not as strong or reliable as the original Sun Lift brand.