Features: brand new and high quality The photographic contrast device allows to take pictures on the black background of the oral cavity. They contrast with the teeth and eliminate those unwanted elements, making it easier to obtain a clear for image of the inside of the oral cavity. It is very comfortable for the patient and makes the for image easier to present to the patient. They can be cleaned and decontaminated through any process, can be autoclaved, and can be sterilized repeatedly. The outer layer is made of soft silica gel, which is opaque, non-reflective, non-deformable, comfortable and soft, and will not scratch the patient's mouth. There are a total of 2 different oral cavity models for you to choose, which is easy to use. Specifications: Material: Outer Layer: Silicone Length: Approx. 20cm Upper Width: Approx. 7cm Handle Width: Approx. 2.7cm Style:1/2/3 Package Includes: 1x Dental Photography Contraster Board 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.