Narva's LED Side Marker Lamp Amber 9-33V is one of the smallest ADR/ECE approved lamps in the world measuring only 19mm in diameter (lens) and protruding no more than 7mm. No screws are required for fitment, just laser cut or drill a 19mm hole, insert the grommet and push in the lamp. Suitable for either 12 or 24V vehicles, the low profile design protects them from damage as does the virtually unbreakable polycarbonate lens.