Rosco Steel Patterns, or gobos, are widely used by designers in theatre, film, photography and television to create atmosphere, project scenery, and generally enhance the visual impact of their lighting. To insure design integrity the patterns are etched using a precise double-sided process on stainless steel. The result is durable, high quality patterns which will withstand the extreme heat at the gate of ellipsoidal spotlights. The popular "A" and "B" sizes fit most ellipsoidal luminaires. Trimming of patterns, where necessary, can be easily accomplished with a pair of scissors.