The Vortex Copperhead 3-9x40 Riflescope has a long eye relief, locking diopter, and fully multi-coated lenses. It is made of tough construction and has bright images. It’s black anodized single-piece aircraft-grade aluminum 1-inch tube is nitrogen-purged and o-rings are sealed for waterproof, fogproof, and weatherproof performance. Comes with removable lens covers and a dust cloth. Backed by the Vortex lifetime warranty.