Designed to fit in tight plenum spaces, the WAC Lighting Oculux 3.5" LED Round Open Reflector Trim offers a sleek, razor-thin spotlight that installs in airtight remodel and new construction Oculux housings. Made from Die-cast Aluminum for durability, this Reflector trim features a 4.5” cutout and is able to survive in wet environments. Energy Star rated and dimmable with an ELV, TRIAC, or 0 – 10V dimmer.