This Anti-Reflection Device provides a low-cost, retro-fittable, and field-practical way to hide reflection on Leupold 40mm objective lens optic surfaces with the use of a high-tech honeycomb material. This product is not compatible with flip covers. Fits the Following Leupold Scopes: Mark 4 LR/T 10x40Mark 4 LR/T 16x40Mark 4 LR/T 3.5-10x40Mark 4 LR/T 4.5-14x40Mark AR MOD 1 4-12x40Mark AR MOD 1 6-18x40VX. R 3-9x40VX. R 4-12x40VX-1 4-12x40VX-2 3-9x40VX-2 4-12x40VX-2 6-18x40VX-3/VX-3i 3.5-10X40VX-3/VX-3i 4.5-14X40VX-3/VX-3i 6.5-20X40 Tenebraex ARD (NOT Flip Cover Compatible) Black for Leupold 40mm Objective Diameter Lens Scopes 40LTC0-ARD