Welded tubular construction, fitted with anti-ascent pull through bar which locks in mobile position onto tread via hook mechanism. Moves fully through tread when in static postion allowing castors to retract. Grey non-marking feet to front legs. Mounted on 2 x 200mm fixed solid rubber tyred wheels and 2 x 75mm grey non-marking swivel castors (castors retreat with lever) choice of anti-slip or punched treads. Finish: light grey epoxy/yellow anti-ascent bar.