Mix Size 26 mm to 28 mm, Weight approximately 14 to 16 Grams each Set of 9 pieces of Medium size Quartz Crystal Diamond shape Extractors.The set comes in a beautiful Box These are Medium Size Quartz crystal Diamond shape Extractor used in Grand Master Choa kok Sui Pranic healing. It is a very powerful extractor used to remove negativity and dirty energy from the chakras. For more information about the please learn GMCKS Pranic Crystal Healing.