This 12" x 50' roll of Matte Black Cinefoil is made from a non-reflective aluminum material that virtually "soaks up" light. Ideal for masking light leaks and/or eliminating unwanted reflections, it can be quickly shaped to form barndoors, flags, and other configurations. Lightweight, yet durable, Cinefoil can be quickly positioned in place with tape, staples, or adhesives.