These particular trellises are made from Pine and mostly were untreated bare wood. They can be made with or without frames, square or diamond design and pretty much any shape to cover any area. The last photo of trellises were sprayed with oil based exterior Mahogany Stain as they were expected to be more exposed to the sun and built in a way to form a sort of privacy fence. Once the ficus trees behind the trellises filled in to form a hedge, it created full privacy.