Therapy basis: Bases on the traditional Chinese medical theory of cure inner illness through outer treatment. It has the similar treatment basis with the substitute therapy.The pillow makes use of the natural gypsums cold speciality to treat illness relatively. Major efficacy: It could make an obviously efficacious cure for high blood-pressure, toothache caused by inner reason, headache and some certain illness.Component:Natural Gypsum. (CaSO4?2H2O)Product specifications:Large: 36cm x 18cm x 7cmMedium: 34cm x 16cm x 7cmSmall: 30cm x 14cm x 7cmstandard export packing(with box shown in pic)