Translucent decorative collars fill the aperture with the blue color while producing white general downlighting. Collars are available in different lengths. Use to add interest, create a theme, match a theme or define a space. Depth: 3/4" Finish: Blue Compatible Trims: NIO-2: 2" Iolite Dedicated NIOB-2: 2" Iolite Dedicated NIOC-2: 2" Iolite Can-less NIO-4: 4" Iolite Dedicated NIOC-4: 4" Iolite Can-less NPR-4: 4" Pearl Retrofit NPR-56: 5"/6" Pearl Retrofit