Sandwich support board, edges with natural anodized aluminum profiles and rounded plastic corners. Edging glued watertight. Writing surface with enamelled and magnetic steel, glued to support board, can be rotated horizontally through 360° and locked in any position. Oval tubular steel frame, epoxy resin coated, mobile on 4 sturdy swivel casters, 2 of which can be locked. Board includes marker tray.