Lenses and other optical surfaces made from glass quartz or plastic can be easily scratched if you do not clean them with a very soft surface. High quality Grade 105 Whatman™ lens cleaning tissue provides the ideal solution. The tissue is chemically pure and free from silicones and other additives. Most importantly it can be relied on to safely remove surface moisture and grease. The soft texture will not damage lenses or optical surfaces. High absorbency ensures the safe removal of surface moisture and grease. It is very strong and leaves no fibers. Thickness: 0.035 to 0.040mm. Dimensions: 460 x 570mm. 500/Pack. Whatman™ #: 2105-918.