4230 Push Button Switch Label Kit50 ICON Labels used on Backlit Push Button Switches. Scratch resistant polycarbonate material. Back printed for durability. Waterproof adhesive for longevity in wet environments. 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.