100% silicone material silicone thumb ring embossed ,debossed ,print SGS,ROHS approved 20 years experience 1. Item : silicone thumb ring,silicone finger ring ,silicone finger circle ,silicone thumb circle silicone seal ring ,finger silicone ring ,hot selling finger ring2.Introduce :length:9.42cm width :1.7/1.2cm also can meet your prefer add ion ,make your finger and muscle relax any healthy ...