What types of armrests do office chairs have?

Office chair armrests range from fixed to 4D (height + pivot + forward/back + rotation). For most office users, height-adjustable (1D) or 2D armrests are sufficient. For intensive keyboard and mouse users, 4D armrests allow the most natural forearm and wrist positioning. Set armrests so the elbows rest at approximately 90° with forearms parallel to the floor. At OfficeFurniture2go.com, product specs specify armrest type and adjustment range — call 1-800-460-0858.