1.100% Silicone with ions 2.Top Quality,low price 3.Logo customized 4.CE,ROHS,SGS 5.Promotional gifts Specification: silicone ion healthy watch bracelet Material100% environmental silicone rubber material, non toxic silicone, Electronic drive Can Display Month, Date, Time and Minute.,1-3AM Water proofStandard size(out diameter):14-16m for small size,17-18cm for medium size, 19-20cm for large size ...