Material and SizeMade of ABS and silicone cushion pad. padded memory foam attaches firmly to the surface, Feels very comfortable, durable and soft. Cut: 11.42x5.51 inch. Easy to install1.Fix the clamp and tighten the screw. 2.Fix the card to the clip. 3.Installation complete. 4. use comfortably. 180 rotation This computer armrest can be adjusted by yourself. Although you don't need to use it. Just set this parallel on the table so it doesn't take up your space. Look tidy and very useful. Relieve Elbow PressureRelease your neck and wrist pressure while you work and play. Relieve your fatigue and pain. help to promote blood circulation effectively. Office and home necessarySuitable for long hours of working in the office, computer, keyboard, sleeping mat, daily use at home, a office game entertainment, etc. Provide soft and warm touch for your elbow and wrist all the time.