... Strength of Silicone MaterialElongationexcellent PermeabilityexcellentOxygen Resistantexcellent High and low temperature resistanceexcellentOzone Resistanceexcellent Electric insulationexcellentWeathering resistantexcellentNon-toxicgoodUV ResistantexcellentAlcohol ... 4. Tolerance: strictly upon international standard, no flash.5. Color: black, transparent, green, red, yellow, grey, purple, ...