Set of Three Crystal Balls (40mm, 30mm and 20mm Size)-for Harmonizing Environment One of the finest crystals perfectly faceted to give greatest amount of prismatic effect. Dramatically beautiful, throws rainbows of color and improves the Fengshui of any environment. Hang in windows to bring positive energy from outside. Hang in dark areas of your home, office or hallways or energize a particular sector. Hang in your car to deflect away tiresome energy and to stimulate the environment in your car.