... product and package CPL extrude white cloud CPL eliminate reflection from nonmetal surface glass or water. OEM CPL filter 35mm1. ... Origin Guangdong China (Mainland)MaterialOptical GlassFilter Ring MaterialaluminumType CPL filter Size:30.5mmColorSilver and blackGlassThickness1.9mmRing Thickness7mmpackagePlastic ... . OEM filter including : Part name Diameter (mm ) ;CPL filter 25,27, 28,30, 34,37, 40.5, ...