Diamond Group By Valterra LED Exterior Light Bar - 12in 20 Diode 3-Wire Red. It is 12 inches long and has 20 diodes. The diodes have the following functions: stop turn and taillight. It features a surface/screw mount design for RVs under 80 inches wide. Features of Diamond Group By Valterra LED Exterior Light Bar - 12in 20 Diode 3-Wire Weatherproof LED bar light Dimensions: 12-3/4" length x 1-1/2" width x 3/4" depth Surface/screw mount design for RVs under 80" wide 20 diodes function as stop turn and taillight Meets OEM standards Package Contents: Diamond Group By Valterra LED Exterior Light Bar - 12in 20 Diode 3-Wire Diamond Group DG52435VP: By Valterra LED Exterior Light Bar - 12in 20 Diode 3-Wire Red