The Westcott Pattern Gobo Pack by Lindsay Adler for Optical Spot is an add-on accessory for the Westcott Optical Spot that can be used with most flash heads up to 100W to project focusable patterns on any surface. Patterns included in the 10-pack are dotted lines, rays, checkered, Victorian, arches, kaleidoscope, abstract shapes, dotted line, Rubik, and criss-cross.