The 5 11 pressure treated diamond trellis is perfect for adding interest to a bare building wall or for use as a static boundary divider to break up your gardenutilsing a diamond design the diamond trellis provides a superb surface for encouraging the growth of a climbing plant waltons trelliss are pressure treated which means they have undergone a vacuumed compression process that forces preservative into the grain of the wood through pressure this makes the wood more durable and resist