1、Made of high quality material, which is stretch, no smell. 2、Withstand 121 degrees high temperature, can be sterilized with boiling water. 3、Placed in the mouth can be very comfortable to open the upper and lower teeth, easy for doctors to operate. 4、A good and effective intraoral supporting device when you see a dentist. 5、Different sizes to meet the needs of people of different ages. Feature: Made of high quality material, which is stretch, no smell. Withstand 121 degrees high temperature, can be sterilized 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: Medical Plastic Weight: 32g / 1.1oz Shape: Big, Middle, Small Color: Purple, Green, Yellow Product dimension: Big: 3.95*3.95*2.04cm / 1.56*1.56*0.8in Middle: 3.45*3.65*1.7cm / 1.36*1.44*0.67in Small: 3.3*2.8*1.7cm / 1.3*1.1*0.67in Package 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.