... China (Mainland)MaterialOptical GlassFilter Ring MaterialaluminumType CPL filter Size:30.5mmColorSilver and blackGlassThickness1.9mmRing Thickness7mmpackagePlastic box 3. Main ... name Diameter (mm ) ;CPL filter 25,27, 28,30, 34,37, 40.5, 43,46,49,52,55 ... -coated filter / MC UV filter 25,27, 28,30, 34,37, 40.5, 43,46,49,52 ... Red, green, orange, grey, blue, yellow25,27, 28,30, 34,37, 40.5, 43,46,49,52,55, ...