Alumina® Flip-Back Lens Covers feature powerful neodymium magnets to hold them securely closed and triple O-ring seals for maximum protection from the elements. When opened, they can fold completely back against the riflescope, with a unique low profile that keeps them out of the way. The round objective models are clockable, so you can rotate the lens cover to open any direction. Precision machined from the same aerospace-grade aluminum used in the construction of Leupold® riflescopes, Alumina Flip-Back Lens Covers offer superior performance, ruggedness, and quick, easy operation that has them standing above the rest. Available in a variety of sizes for both eyepieces and objectives with the Light Optimization Profile™.