Check the listing for details. Racing Optics XStack Laminated Tearoffs 10218C 12-3/4 (6 PACK). Color: Clear, Condition: New. Listed at 169.99 USD. Racing Optics XStack Laminated Tearoffs, 10218C, 12-3/4, (3 STACKS, 10 LAYERS) (6 PACK) Description Racing Optics X Stack Laminated Tearoff System represents the latest and best product introduction to date from Racing Optics, the leader in motorsports laminated tearoffs. The laminated technology creates a distortion-free optical lens. The X Stack Laminated Tearoff System provides the following Features: 10 Layers thick for long races, 3 more per stack than the Speed Stack 7 system Better visibility than any other laminated tearoff system available The worlds BEST tearoffs More layers Better visibilityEach package of Racing Optics X Stack Laminated Tearoffs includes 3 stacks of 10 tearoffs for total of 30 tearoffs per package.6 Pack includes 18 Stacks of 10 tearoffs. Totaling 180 tearoffs total