Tiffen 4 x 5.65" Linear Polarizer Filter 45650POL B&H Photo Video
Amazon.com : Tiffen 4x5.65" Linear Polarizer Filter : Camera Lens Polarizing Filters : Electronics
NiSi 4×5.65” True Color Polarizador Lineal - NiSi Iberia
NiSi Cine Filter Rotating CPL True Color 4x5.65"
Amazon.com : NiSi Cinema 4x5.65 True Color Linear Polarizer | Polarizing Lens Filter for 4x5.65 Matte Boxes | Cinematography and Videography : Electronics