Monstrum Tactical Cantilever Reversible Scope Ring Set, Offset Design (30 mm Ring Diameter) Scope rings for use with standard tube style rifle scopes, available in 1 inch diameter or 30 mm diameter models Distinctive offset reversible design allows for added flexibility for scope placement and optimum eye relief. The rings extend forward 1.5 from the base and can be mounted in either direction dependent on your preferred scope placement and your mounting system. Mounts to any standard Picatinny rail equipped rifle High profile in height, 0.8 inches from base of mount to bottom of rings