EUBEST Black Adjustable Arm Wrist Rest Support Computer Desk Extender with Case Star Cellphone Bag Made of strong ABS plastic. Soft surface pad provides extra comfort. Adaptable for right or left hand users, 180 Degree Rotated Can be easily rotated 90 degrees out of way. No assembly required, easily attaches to a computer desk up to 4.8 cm (1.9in) thick