Amount : 1 pair = 2 Weight: 136 kg (300 LBS) / pair Features: Integrated metal pulley Accessories: 2.4 meter black polypropylene rope (black and red rope) Common use: 1. The pulley hook is fixed in a firm place (such as the ceiling); 2. Use the end of the rope with the hook to hang the items. 3. Adjust the height of hanging items by pulling the end of the rope without the hook a) To raise (adjust upwards) the height of the item: simply pull the rope down b) Lower (adjust down) the height of the item: first you need to push the stopper bar in the pulley up, lower the item to a certain height, then pull the rope down to that it is adjusted to a suitable position Features: The rope can be tightened and locked if necessary Very easy to adjust the height of the hanging lamps (objects) Keep the lamps and plants in a suitable position, which is more conducive to plant growth Adapts to all shades of plant lighting As long as it is a product that needs to be repaired , it can be used.