The Disc Umbrella Reflector for Profoto Flash Heads keeps the light from spilling off the edges of the umbrella. Its compact design allows the lamphead to be easily packed for carrying. It can be supplemented by a barndoor and a snoot. It also accepts Lowel brand Omni accessories. Due to the B1 and D1 monolight's umbrella receptacle design, umbrellas can't be used when using the disc reflector.