Wesbar 54004 Waterproof LED Surface Flange Mount Tail Light with Chrome Trim Snap Ring Waterproof LED Red Stop/Tail/Turn Light, black flange with Chrome Trim Ring 10 LED diodes meet FMVSS/CMVSS 108 requirements Surface mounting with pre-wires supply and ring terminal ground for easy installation Approved for vertical or horizontal mounting 7.5" length x 3.28" width x .82" depth