Features1Can be autoclaved up to 121 degrees Celsius, easy to clean, bring you convenience. Important accessory for orthodontics. 2During the orthodontic process, ensure that the upper and lower jaws in the patient's mouth are in a separate state. 3Made of high quality silicone material, safe and non?toxic, eco?friendly and harmless, you can use it with confidence. 4Light weight and in small size, easy to store and carry, suitable for dental clinics, dental hospitals, etc. 53 sizes of dental bite block, can be applied to different groups of people, you can choose according to ctual situation.SpecificationCondition: 100% Brand NewItem Type: Dental Bite BlockMaterial: SiliconeCharacteristics: Elastic silicone material, resistant to high temperature of 121Product Use: It can support the upper and lower teeth when placed in the mouth, convenient for operation.Size Chart:Type Size Purple L 39.5 x 39.5 x 20.4mm / 1.6 x 1.6 x 0.8in Blue M 34.5 x 36.5 x 17mm / 1.4 x 1.4 x 0.7in Green S 33 x 28 x 17mm / 1.3 x 1.1 x 0.7inPackage List1 x Dental Bite Block