Product Information Rectangular Size: 3.9 x 5.9" / 100 x 100 mm Thickness:0.1" / 2.0 mm Material: KW Optical Glass(B270 Toughened Glass) Weight: 49 g Wolverine Dream Star Filter The Kase Wolverine star filter is made from Toughened optical glass. It adds durability in an accidentally drop. The size is 100*100*2mm, which can be used on 100mm square filter holders, with many different size of lenses.   The Special glass chemical reaction technology is adopted in this K100 square dream star filter, to make the light pass through more smoothly and naturally. This effect is great for night sky photography, which has the function of highlighting bright star and make the night sky dreamy. K100 Wolverine Dream Star Filter can bring soft and exquisite image. The images looks like putting on a hazy veil over the night sky. It's dreamy but still keeps high-definition imaging quality.   Package list: Kase 100 x 100 x 2mm Wolverine Dream Star Filter * 1 Self-contained Filter Bag * 1