This Tenebraex Anti-Reflection Device provides a low-cost, retro-fittable, and field-practical way to hide reflection on optic surfaces with the use of a high-tech honeycomb material. This ARD is not compatible with a flip cover. Fits the Following Leupold Scopes: Mark 5 HD 5-25x56Mark 5 HD 7-35x56VX-3i 3.5-10x56VX-3i 4.5-14x56VX-5 HD 3-15x56VX-5 HD 7-35x56VX-6 7-42x56 Tenebraex ARD, Black Flip Cover Compatible for Leupold 56mm Optics 56ARD-012BK1