Material & SizeMade by ABS and silicone cushion pad. padded memory foam tightly attaches to the surface, Feel very comfortable, durable and soft. Size: 11.42x5.51inch. . Easy to Install1.Fix the clamp &Tight the Screw. 2.Fasten the board on clamp. 3.Installation finished. 4.Comfortably use. . 180RotationThis computer arm rest can be adjusted by yourself. While you dont need to use this. Just set this parallel to the table so that it doesn't take up your space. Look tidy and very useful. . Alleviate Elbow PressureRelease your neck and wrist pressure while you are working and have a entertainment. Relieve your fatigue and soreness. contribute to promote the blood circulation effectively. . Office & Home NecessarySuitable for long working hours in office, computer desktop, keyboard pad, lying sleeping pad, home daily use, office table gaming entertainment etc. Provide soft and warm touch for your elbow and wrist all the time. .