This Bagua depicts the trinity of heaven, earth and mankind in an early heaven arrangement. The mirror has a metallic BaGua setting, is framed in metal with a round convex mirror in the center, and comes with its own hanger. This mirror is used to diffuse and deflect negative energy from 'poison arrows' such as a tree, or a sharp edge of a building, pole, any sort of tower, roof line edge or any other building or structure facing your front door. It is only used outside the house, office or retail business, and is to be mounted with the mirror facing toward the offending object/poison arrow. Never use inside. The total mirror is approximately 4.8 in diameter.