Lytecaster 1121 6.75 Inch Opal Disk Diffuser Reflector Trim features a 3-layer cased opal glass diffuser with a hydroformed aluminum semi-specular finish reflector. Diffuser twists tight to reflector trim. Neoprene seals unit under pressure of twist lock. One 120 volt, A-type medium base incandescent/halogen/LED lamp is required, but not included. UL listed. Suitable for wet locations in covered ceilings only. A complete fixture includes a frame-in kit and a trim kit, sold separately.