wholesale Orthodontic Accessory Features: Made of high quality stainless steel .It is connected to the tongue or palatal side of the teeth with a dental composite resin. Package: 2 pcs per bag. Flat and easily adapted to tooth contours. Smooth surface-comfortable on the tongue. Quick and easy to fit. Product Introduction:wholesale Orthodontic Accessory website:http://www.denrum.com.cn/orthodontic-accessory/