It has a heavy chrome plated metal housing with a threaded stud mounting.
The pictures are showing the Clear Lens.
Amber/Red Lens is also available.
The light has 21 LEDs on each side.
One side with red LEDs and
the other side with amber LEDs amber.
The lenses are polycarbonate with fully sealed electronics with a unique bubble style.
Here is the wiring:
White is ground,
Red is Stop, Turn, Park, and
Black Tail/Clearance.
It has a weight of 1 lbs 1.5 oz.
Watch the video for more like dimensions and how they do in the dark.
More Info Here.