K&F ConceptCircular Polarizer CPL Filter (Black-ink Process On Outer Rim of Glass) (77mm) It is composed of two pieces of glass, mounted independently inside a round frame so that one can be rotated relative to the other It increasingly cuts out glare and haze Reduce glare from water, glass, or any non-metallic surface, to create deep and rich scenic images Black-ink process on outer rim of glass cuts internal reflections Pro quality anti-reflection coating