Constructed of iron, this is the strongest A-frame sign we offer. Measuring 24" x 18", this Superstrong Angle Iron Frame Kit includes a durable iron frame with powder-coated finish and full-color artwork printed on 4mm corrugated plastic. The frame also accepts rigid substrates such as aluminum). The signboard required nuts and bolts (sold separately). Great for temporary outdoor use. A one-year warranty is also included.