Light functions as combination turn signal, parking light, or warning light. Durable, black ABS housing with two snap-on amber lenses. Two lead wires exit through 1/2 in diameter hollow mounting stud. Grounds through mounting stud. Converts to single-face amber light by snapping on black back. 4-1/8 in diameter x 2-3/8 ft ' wide. Mounting stud is 1-9/16 in long.