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. Eack package contains 3 stacks of 10 tearoffs for a total of 30 tearoffs. Clear Fits: Simpson Matrix, SX, Jr Shark, HJC auto and OMP. Post Center: 11 1/2"