Nikon ProStaff Rimfire 4 x 32 Black Matte Riflescope (Nikoplex)br Compact riflescope with 4x magnification and 32mm objective lens br Fully multicoated optical system transmits up to 98 percent of available light br Zero-reset turret with spring-loaded adjustment knob 41 inches of eye relief br Nitrogen-filled O-ring-sealed housing for waterproof fogproof performance br Nikoplex reticle quick-focus eyepiece measures 115 inches