Silicone rubber is a new type of polymer elastic material with high temperature resistance (250-300 ℃) and low temperature resistance (-40-60 ℃), good physiological stability, and the ability to withstand repeated harsh and disinfection conditions. It has resilience and small permanent deformation (no more than 50% within 48 hours at 200 ℃), breakdown voltage of (20-25KV/mm), ozone resistance, and UV resistance. Special silicone rubber has characteristics such as radiation resistance and oil resistance.