Diamond Group By Valterra Marker LED Light - 4in x 2in 9 Diode Red. It has 9 diodes for strong light output and features 2-wire connection. This light will replace any standard 4" x 1-1/2" or 4" x 2" fitting and is surface mount and DOT approved. Features of Diamond Group By Valterra Marker LED Light - 4in x 2in 9 Diode Waterproof LED marker light Dimensions: 4" length x 2" width Features surface mounting and 2-wire connection DOT approved Meets OEM standards Package Contents: Diamond Group By Valterra Marker LED Light - 4in x 2in 9 Diode Diamond Group DG52712VP: By Valterra Marker LED Light - 4in x 2in 9 Diode Red