Non-locking castors can be added to single-faced units for easy mobility and are available separately. Silver powder-coated metal shelves. Crossbars are 25mm dia. round tubes with powder-coated finish. Metal inserts allow shelves to reconfigure between holding books and magazines easily. Flat shelf measures D133mm; magazine shelf measures D48mm. Sign holder measures H215 x W265mm. Combine two single-faced units back-to-back to create a double-faced display.