Made of silicone rubber for better heat and cold resistance.Ideal for food machine and food packaging machinery.Colored in standard food safety blue for simple visual verification.Contains metal powder, allowing for accurate metal detection.Operating Temperature: 14F to 230F (-10C to 110C).WARNING: This product can expose you to 1,3-butadiene, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65WARNINGs.ca.gov.