The Pro 959 ergonomic footrest provides legs with firm support. This footrest helps maintain a good sitting posture while working at VDU screens. We advise a footrest which is at least 45 cm wide and 35 cm deep. Its adjustable range should be at least 11 cm as measured from the floor surface. The slope of the support surface must be adjustable from 5 to at least 15 degrees. Ergonomic: Height adjustable (60-370 mm) and adjustable angle provides stable support for the feet