All aluminum seat planks and under structure provide a lightweight, stable bleacher that is easily tipped for mobility. The 10"W aluminum seat planks have a non-skid surface for added safety. Transition foot prevents floor marking and four 4" non-marring, smooth rolling, swivel casters make moving easy. Recommended for indoor use only. Bleachers come with a natural aluminum finish. In some of our photos they are are shown with an optional powder-coated blue paint. For pricing and powder-coated color options, please contact our Bid department.