Features: 1) Frame, tray, and stand: aluminum, 2) Board: white painted steel sheet (or porcelain coated steel sheet) 3) Component parts: plastic 4) Material durability and safety 5) Availability of products built to accept several different types of writing implements including chalk, pencils, permanent markers, or crayons as well as dry erase pens 6) Dimensions: a) 90 x 120cm b) 90 x 150cm c) 90 x 180cm d) 120 x 150cm e) 120 x 180cm f) 120 x 200cm g) 120 x 240cm 7) Other specifications available upon request 8) With wheels and swinging board Outer packing: Carton