... matCharacteristics 1)made of 100% food grade silicone 2) High voltage resistant and heat resistant. 3) Impregnant proof, which means it ... is resistant for acid, alkali, hydrocarbon, chloride, ester, aether, ketone, and ... on. 4) Radiation proof. 5) Physically inert, nontoxic and inodorous. Dimension: Not fixed, adjustable according to customers' ...