This Tenebraex RAL8000 objective flip cover provides protection for Leupold 40mm optics and flips out of the way when shooting. This product also includes an adapter ring to attach the flip cover to your riflescope. 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 Objective Flip Cover w/ Adapter Ring RAL8000/Black for Leupold 40mm Objective Diameter Scopes 40LTC5-FCR