Neewer 55MM Macro Close-Up Lens Set 4 Filter Kit +1+2+4+10 Magnifications 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 techonolgy to give you total on location control of color saturation, make skies bluer, grass greener-even eliminate surface reflections from glass and water FLD Fluorescent Filter: Eliminates that annoying greenish tinge which fluorescent lights add to photos. Multi-coated, high quality glass with an integrated macro lens for close-up work. A protective case and front and rear caps are included.