4" Bullnose trim with a filleted aperture which allows for minimal aperture brightness while still producing the nadir footcandles. Iolite can-less trims require a compatible LED module and driver box. _x000D_ _x000D_ Compatible LED module: NIOC-24LED _x000D_ _x000D_ Compatible driver box: NJCB-12 _x000D_ _x000D_ Finish: Black_x000D_ _x000D_ Accessories: _x000D_ NIO-AS: Translucent/Opaque Deco Collars _x000D_ NIO-HC: Hex Louver _x000D_ NF-R124: Universal New Construction Frame-In _x000D_ NFC-R413: New Construction Frame-In with Collar