Chrome. Build in LEDs will go into a 'scanning mode' when ignition is turned on. When turn signal is activated LEDs will flash together with the turn signals. Dimensions: Mount stud length 1-1/2" from tip of threads to the perch mounted shoulder, 5/16-24 threaded. Inside mirror head / stud & socket assembly are M14-1.5 threaded. Approx. dimensions of glass 50mm high x 150mm long.