DROP DESIGN - Resin material, with a slight transparency, and feels very comfortable. NOT JADE material. It is better to use than traditional combs. After many times design corrections and upgrades, it does not hurt the scalp and does not cause pain any more. The water drop head design is easier to stimulate the acupoints and achieve the effect of head massage. SIGNIFICANCE OF HEAD MASSAGE - The acupuncture points on the head occupies a quarter of the whole body. Traditional Chinese medicine believes that the head connects the meridians of the whole body and is the master of the whole body. It plays an important leading role in controlling and regulating the life activities of the human body. PORTABLE & WARRANTY - Size: 10.5cm*5.5cm*1.8cm. Weight: 50g/piece. The thickness of 18mm makes the head massage comb more convenient to hold. The comb is very light that you can put it in your bag and take it out to massage yourself anytime and anywhere. If you received broken one, please contact us asap, we will reissue in time or arrange for a full refund. MULTI-PURPOSE MASSAGE - The head massager is not only for head, scalp massage, but also for arms, chest, finger especially for people with frequent shoulder and spinal pain. Comb scraping massage also improves mi-crocirculation, eases pain from periarthritis migraine etc. Both acupuncturist & physical therapists regard acupoint massage as green natural therapy, and via this way can help to diminish stress, fatigue, exhaustion, better to relax the whole body. 5.GREAT GIFT: Package2* pcs massage comb. The gua sha combs are packed in bag outside with foambags. they are the best gift for people who have frequent headaches and uncomfortable shoulders and necks. If you are not satisfied, we will refund at any time.