The smart arch is a self assembly metal arch that measures 2m x 1m when installedr r this arch is made from strong powder coated steel and sturdy enough to support the most vigorous of climbing plants even intertwining two varieties with great effectr r if two or more arches are joined you can created a lovely covered walk way under which to a achieve a soothing dappled light effect join them together sideways to train a vine or let a rambling rose enjoy the space and the effect will be tota