The Pa Kua (or Ba Gua) mirror is a powerful Feng Shui tool. It is placed to protect the home from negative energy sources. The corners of neighbouring buildings or a large angular structure such as a church spire can generate "cutting chi" which has a negative effect on the energy entering the home. These mirrors should be hung outside the home on the left hand side of your front door as you look at it from the outside, to reflect and disperse negative energy. These traditional mirrors are painted with the trigrams to help ward off harmful chi. Reflective mirrors should be hung with care as harmful chi will be redirected. Concave mirrors absorb harmful chi, whilst convex mirror will deflect and disperse it. Dimensions 20 x 10cm or 8" x 4".