Features: new and high quality Light weight, small size, easy to store and carry when you go to see your dentist. Made of food grade silicone material, which is soft and comfortable, without sharp corners, and does not poke or stimulate gums, inner lips/mouths Silicone dental cheek retractor is more flexible and can open and close teeth larger, making users feel comfortable to greatest extent. Silicone mouth opener can be cleaned directly or by other methods. This will be the most comfortable dental opening and closing device you can find, helping the dentist to observe the dental conditions more clean and facilitate diagnosis. Specifications: Material:Silicone Type:Green Not Heat-Resistant Large/Blue Not Heat-Resistant Small/Pink Not Heat-Resistant Small/Blue Heat-Resistant Large/Black Heat-Resistant Large/Green Heat-Resistant Large Size:Approx.5.7x8.5cm/2.24x3.34inches Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Silicone Mouth Opener