3131 Surface Mount Circuit Breaker EnclosureSurface mount option for mounting single and double pole circuit breakers. Surface mount box for mounting single and double pole circuit breakers. Accepts A-Series toggle and A and C-Series Flat Rocker Circuit Breakers. Accommodates optional LEDs and square format labels. Wire glands and fasteners are included. 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.