Leupold Dual Dovetail Rings w/Matte Black Finish Md: 49915, A low profile, 2-piece base design, both front and rear bases accept a rotary dovetail ring. The absence of windage screws on the rear base, makes the dual dovetail extra secure., Type: Dual Dovetail Rings Size: 1" Height: Low Tube Diameter: 1" Finish: Matte Black, Manufacturer: LEUPOLD & STEVENS INC, Model: 49915