Polaroid Optics 72mm Multi-Coated Dual Filter Kit BLUE (MC UV, CPL) UV Protective Filter: Prevents loss of sharpness and contrast by filtering out UV rays and Haze. Protects Lens from scratches, scuffs and smudges CPL Circular Polarizer Filter: Uses Polaroids patented Polarizing technology to give you total "on location" control of color saturation, make skies bluer, grass greener-even eliminate surface reflections from glass and water - all with picture perfect results" Color Coded For Easy Identification &lt;&gt; Fun, Sporty, Stylish Colors For The Hip And Trendy Photographer &lt;&gt; For All Ages Precision Machined, Aluminum Rings High Index Optical Glass &lt;&gt; Maximum lIght Transmission