The Leupold Alumina Flip-Open Cover 20mm Machined Aluminum delivers lightweight durability and reliable protection for your optics in any weather, featuring a precision-machined aluminum construction that stands up to rugged field use while keeping weight to a minimum. Designed for versatility, these lens covers come in sizes from 20mm to 50mm to fit both objective lenses and eyepieces, so you can protect multiple optics with a single, robust solution. Powerful neodymium magnets secure the cover closed, creating a watertight seal that shields lenses from moisture and debris, yet the flip-ready design lets the cover swing fully back into a horizontal position for a low-profile setup that wont interfere with your shooting stance or field of view. Ideal for hunters and shooters who demand dependable performance, this cover enhances optics readiness and protection, ensuring your lenses stay clean, clear, and ready for action whether youre in the field or at the range. Leupolds Alumina Flip-Open Cover combines functional protection with robust construction, making it a valuable addition to your gear.