Silicone Mouth Props - Small (Pedo), Neon Yellow 2/Pk. Sterilizable by all methods including dry heat up to 500 degree F (260 degree C). Autoclavable. Odorless and tasteless. Can be cold, steam or chemical ve sterilized to 260°F or 127°C. size is specifically tailored for small children, ensuring a comfortable fit.. The Plasdent Mouth Props Silicone Neon Yellow are dental accessories designed specifically for young children. They serve as mouth props to help keep the patient's mouth open during dental procedures. The props are made of silicone material, which is soft, flexible, and safe for oral use.