Bargman 34-47-802#478 Series Amber Clearance/Side Marker Light This light has an ABS base with an acrylic snap-on reflex lens and built-in drain hole This unit is ready for surface mounting with quick connect wiring installation for supply wire and is self-grounding Dimensions 2-3/8 inches diameter X 1 inch Includes 12 volt, 57/1895 bulb