6" Projector Effects Wheels provide visual stimulation in any environment. Vivid images flow in an arching pattern on walls, floor, sensory room equipment and even an individual. The image varies in size depending on how far away the projector is from the area. The further away from the wall/floor the larger the image.When used with the SNAP Projector the rotation speed can be adjusted to fit the needs of the individual. Made of durable plastic and comes in convenience environmentally friendly storage package.Compatible with TFH SNAP Projectors and Solar Projectors.