How to block at different heights?1. take the hook2.Pull the strap perpendicular to the ground at the desired height, if it is not blocked, do not let go immediately.3.Pull 1 to 3 cm to block it at the slowest speed (suggest 10mm/s), please make sure the weight of the goods is not less than 1.2kg or more than 15kg.4.For higher, hold slowly the flowerpot bottle to the length you like and release.To lower, lightly hold the flowerpot bottle then let the weight of the plant fall back.Features:Type: Plant hangerMaterial: plastic with nylon ropeSize: approx. 7.6 * 3.5 * 20 cm / 3.0 * 1.38 * 7.9 inchMaximum weight: 15 kgRetractable length: approx. 20 to 90 cm / 7.87 to 35.43 inchSuit for: garden baskets pots and bird feederNote:1.Please do not hang goods that are too light or too heavy heavy, make sure between 1.2 kg and 15 kg.2. Please make sure the hanging hook is vertically down (otherwise it won't work).3. please allow 1-2cm errors due to manual measurement.4.The hanging plant rack is mainly designed for indoor hanging but not suitable for outdoor wind.