Optronics - 2.5 inch Round Sealed Side Marker/Clearance Light. Round clearance or side marker light. PC-Rated light that functions as both a clearance and side marker light when properly mounted on a 45 degree angle. Features sonically sealed, waterproof lens and housing in a single unit. Accepts industry standard 2-prong plug. Requires standard 2-prong plug. Requires mounting grommet and plug for complete installation. Dimensions: 2-1/2 inch Width x 11/16 inch Depth. Polypack. Red.