Sig Sauer Tango DVO features a 30mm tube; DWLR-556 red, illuminated reticle and first focal plane. Series DVO Weight 18.50 oz Reticle Illuminated DWLR-556 Objective 24mm Eye Relief 95 - 100mm Field Of View 124.80 - 19.60 ft @ 100 yds Magnification 1-6x Tube Diameter 30mm