Contura III Switch SPDT - (ON)-OFF-ON. Vibrations, shock, thermoshock, moisture and salt spray resistant. Mounts in Blue Sea Systems Contura Water Resistant Panels and Contura Switch Mounting Panels. WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.