The Steiner 50mm Anti-Reflective Device (ARD) is a thread-on optical accessory designed to minimize objective lens reflections and help maintain concealment in the field. Its honeycomb baffle structure reduces reflected light without significantly affecting image quality or light transmission, so your view remains bright and sharp. Purpose-built for compatible 50mm Steiner binoculars, the lightweight OD Green ARD installs quickly by threading onto each objective for durable, repeatable performance. Package dimensions are 6.1 x 3.19 x 2.4 inches with a package weight of approximately 0.507 pounds. Model 750. UPC 000381807502.