You can freely adjust the height with a slight rotation. The four specifications are 3.15inch (adjustable by 3.15- 4.72inch), 4.72inch (adjustable by 4.72-7.48inch), 7.08inch (adjustable by 7.08-12.2inch ), 10inch(adjustable by 10-17inch ), and it is not recommended to affect the weight excessively. The package includes 4 strong joints and 20 screws, which is convenient to install. High-strength material, selected carbon steel, weighing up to 600 kg, durable. The four corners are thickened to fix the top cover, which is smooth and flat, firmly supported and easy to loosen and fall off. Thickened rubber foot pad, anti-slip and quiet, to protect the floor from damage. Not afraid of moisture, thick multi-layer paint design, rust-proof, wear-resistant, corrosion-resistant, beautiful appearance, long-term placement in the bathroom is not easy to rust. Fearless and damp, thick multi-layer paint design, rust-proof, wear-resistant, corrosion-resistant, beautiful appearance, long-term bathroom is not easy to rust. Suitable for sofa, TV, bathroom, bedside table and other life scenes. [Guaranteed] YAOYAO LAND provides after-sales service for three months, so you can buy with confidence. If you don't understand anything, please don't hesitate to ask. Within three months from the date of arrival of the goods, we will take measures such as replacement or refund if there are initial defects or failures, damages or other problems in normal use, please rest assured. (Contact information: Customer Service, Order History and Contact Exhibitor)