Tiffen 67mm Circular Polarizing Filter 67CP B&H Photo Video
Amazon.com : PROfezzion [2 in 1] 67mm ND Filter [ND2-ND32] and CPL Polarizer Polarizing Filter, Variable Neutral Density Adjustable Fader with 5 Hard Stops for Canon/Nikon/Tamron/Sigma Lenses : Electronics
Breakthrough Photography 67mm X4 Dark 6-Stop Titanium Circular Polariz — Glazer's Camera Inc
Amazon.com : 67mm CPL Circular Polarizer Filter for Canon EF-S 18-135mm f/3.5-5.6 is Lens : Electronics
Amazon.com : JJC Professional 67mm Circular Polarizer Filter HD 18-Layer CPL Filter for Canon EF-S 18-135mm, RF 24-105mm STM, Sony FE 24-70mm f4, Sigma 16mm f1.4, 35mm f1.4 & Other Lenses with