The portable PROP-IT 5-in-1 Music Educator s Teaching Tool is made of sturdy lightweight plastic and collapses to a compact to 18 x 18 x 1 for storage . Flip-up extensions allow it to hold large 19 x 25 music staff pads. This special package includes an 11 x 17 magnetic dry-erase staff board 30 magnetic letter notes (14 naturals 7 flats and 7 sharps) a dry-erase board marker felt eraser storage bag and an elastic book rack.