Feature: Made of high quality material, which is stretch, no smell. Withstand 121 degrees high temperature, can be with boiling water. Placed in the mouth can be very comfortable to open the upper and lower teeth, easy for doctors to operate. A good and effective intraoral supporting device when you see a dentist. Different sizes to meet the needs of people of different ages. Specification:Material: PlasticWeight: 32g / 1.1ozShape: Big, Middle, SmallColor: Purple, Green, YellowProduct dimension:Big: 3.95*3.95*2.04cm / 1.56*1.56*0.8inMiddle: 3.45*3.65*1.7cm / 1.36*1.44*0.67inSmall: 3.3*2.8*1.7cm / 1.3*1.1*0.67inPackage list:3 * Device(1* Big+Purple, Middle+Green, Small+Yellow)Note:The actual product color may deviate from the photo due to light.There may be a slight deviation in the measurement of product dimensions.