Amazon.com : Neewer 67mm Variable Fader ND2-ND32 ND Filter and CPL Circular Polarizing Filter 2 in 1 for 67mm Thread Camera Lens No X Spot Weather Sealed, Aluminium Alloy Frame : Electronics
Professional 58MM UV CPL ND4 Lens Filters Kit and Altura Photo ND Neutral Density Filter Set. Photography Accessories Bundle for Canon and Nikon Lenses with a 58MM Filter Size
UV vs CPL vs ND Filters Explained: Do you Really need them?