Absorbs the ultraviolet rays, and provides a clearer image. Protects your camera lens from dust, moisture, scratches and . Knurled Frame Edge: equipped with a knurling edge for easy attachment and removal. Material: Optical glass Diameter: 77mm, fits for the same size of screw lens Item weight: 26g / 0.91oz Package List: 1 * 77mm UV Filter Note:Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.