CNC machined with the same exacting quality control as the Quick Detachable, this ring is built for the shooter who prefers the sleek profile of a non-detachable vertically split ring. Using larger screws and no moving parts, this system will stand up to the most punishing magnum. Stainless Steel. Note: Mounting hardware included.Ring Height Selection (per Talley)Low for scopes up to 44mm objective with standard barrel contourMedium for scopes up to 50mm objective with standard barrel contourHigh for scopes with a 56mm objective with standard barrel contour