materials and Gre: Made of cold-rolled steel plate, durable and rust-free, 198 mm * 226 mm. The movable pressure hook can be flexibly controlled by 180 degrees, can support BC HERs with different thicknesses, and can accommodate BC HERs with a thickness of up to 50 mm. . adjustable: 6 Angle can be adjusted freely, and each angle can be adjusted to a comfortable reading angle. Give them more choices, choose the most comfortable angle, relieve Rcken and neck pain, and wear visual impairment. Effectively reduce pearlescent sealing and release your hns. . Folding and easy to store: easy to use and easy to carry. When not in use, simply fold it up. Save space and facilitate storage. 4 Thick anti-slip pad made of soft rubber squeezes the taupe part of the desktop to keep it stable and make the surface of its work board smooth. . Multi-function: This versatile bcherstnder is very sturdy and can resist various Gre and styles such as Bchern, tablets, magazines, painting papers, notes, etc. It is suitable for reading in fr Bro, home, travel, school and Kche. They effectively solved the problems of seats and eyesight. S7-1200 programmable controller