Check the listing for details. Racing Optics 10218C 2 mil Laminated Tearoffs XStack 10 (Clear). Condition: New. Listed at 46.30 USD. 10218C - 2 mil Laminated Tearoffs XStack™ 10 (Clear). The XStack™ 10 is a stack of 10 laminated Tearoffs that are 2 mil thick each. The laminated technology creates a distortion-free optical lens.