Compatible with Leupold riflescopes manufactured post-2004, specifically those with 28mm objective lenses, the Alumina Flip-Back lens covers are engineered for optimal performance. These covers incorporate robust neodymium magnets to ensure a secure closure and are equipped with triple O-ring seals to offer superior protection against environmental elements. Fabricated from durable 6061-T6 aircraft-grade aluminum, they are meticulously machined to facilitate swift and effortless operation. When opened, their low-profile design distinguishes these Flip-Back lens covers from others in the market. Additionally, the round objective and ocular models are designed to rotate, allowing them to open in any desired direction.