The 7artisans Streak Blue Cross Line Effect Filter is made of K9 optical glass, which offers high light transmission and color reproduction, ensuring clear and vivid images. Designed to produce a horizontally elongated blue streak from the light source, the cross effect filter is made of K9 optical glass and lightweight 6061 aluminum, making it durable for use. The brushed Blue Starlight effect gives the film a cinematic feel, while the background effect with horizontal lines provides unlimited creative possibilities. The manufacturing process includes coating lenses with different colors and effects, resulting in a wonderful sparkling effect.