#100141 FXM04 toplight (2 circuits) is 20.5″ wide, 5.25″ front to back, and 5.5″ tall with marker cap. Choice of magnetic or screw-down mount, choice of LED’s or Incandescent lamps, choice of colors of plastic and of lettering (which is free, front and back). Marker cap can be amber, clear or green, red or blue. Be sure red or blue are legal in your area. No returns authorized. . ALL toplights are manufactured when your order is received so your choices can be included. You must allow production time of up to two weeks plus shipping time to your location. If we can produce them faster, we always do. Thank you for your patronage.