Non-abrasive with low extractables, these 100% biodegradable tissues are engineered for extreme softness on most sensitive surfaces, such as lenses. Ideal for coated optics and laser cleaning applications. Nonwoven wipers are made of 70% rayon, 30% cellulose. Low in ash and organic impurities. Tissues comply with Government Lens Paper Specification AA-50177. Designed for ISO Class 6 (Class 1000) and above cleanroom applications. RoHS 200/05 and Reach compliant. 4 x 6". 1000/pk.