The Workrite Footrester is height and angle adjustable. Easy height adjustment locks into place automatically. Platform measures 23" wide x 11 1/4" deep and is adjustable in 1" increments from 4" to a maximum height of 15" from the floor. Adjusts as Your Body Does Platform's fluid rocking motion automatically adjusts with changes in body position. Made From High-Quality Materials A heavy gauge steel frame and 3/8" thick composite plastic can take use and abuse. Other Features Extra-wide platform Contemporary charcoal finish Non-skid strips available on quotation. ESD Versions ESD FootResters come with electrically dissipative rubber mat laminated to the platform, then connected to the ground with a brass drop chain.