Specification Brand : Pulsar BulletPoint1 : PRO ND filters reduce the amount of light through the effect of glass-deposition film BulletPoint2 : PRO ND100,200,500,and 1000 provide dimming effects in aperture steps of 6.7,7.7,9 and 10,respectivity.Use them to create a slow shutter effect BulletPoint3 : Subject appears crisp and clear while the background becomes a soft blur. Also Widely used or photographs of waterfalls and other nature scenes to emphasize movement BulletPoint4 : Filter trays have spring catch for security BulletPoint5 : 【Three layers of protection】Multi-layer nanoscale coating. Waterproof coating, easy waterproofing; High hardness coating, scratch resistant; Anti static coating, does not absorb dust. Color : Black ExternallyAssignedProductIdentifier : 7647560734780 ExternallyAssignedProductIdentifier1 : 0812495023644 ExternallyAssignedProductIdentifier2 : 812495023644 ExternallyAssignedProductIdentifier3 : 00719821319665 IncludedComponents : Product body only ItemName : FN 50 mm Cover Ring Adapter for Forward F135/155 ItemPackageDimensions_Height : 1.3 centimeters ItemPackageDimensions_Length : 11 centimeters ItemPackageDimensions_Width : 9.2 centimeters ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : flash-adapter-rings Language : english Manufacturer : Kenko Tokina USA, Inc. Material : Aluminum ModelNumber : PL79172 NumberOfItems : 1 PackageLevel : unit PartNumber : PL79172 PhotoFilterEffectType : Neutral Density PhotoFilterThreadSize : 72 millimeters ProductDescription : Brand: 7artisans Mode: Ture color-vnd Material: B270 optical glass +6061 aluminum alloy True color varialbe: 2-5 stops. filter thickness: 6.4 mm weight: 53.9g(82mm) size: 67/72/77/82mm