Medium Back Knee-tilter. Inspiration is the convergence of comfort, style and exceptional value in an affordable seating series. Steel arm frame on all models is standard in Tungsten (TUN) and optional in Black (BLK). Chrome (CHM) finish is available on armchairs only. Armcaps are made of soft urethane and are warm to the touch. Backrest with polypropylene shroud. Standard with twin wheel carpet casters. Optional soft non-marking twin wheel casters are available for hard surface floors. Standard metal steel base in Tungsten (TUN). Optional Epoxy painted Black metal base