NcStar RUBBER TACTICAL 3-9x40 RANGEFINDER SEFFR3940R Features One piece aluminum main tube with rubber armor coating Variable Power Magnification Multi Coated Lenses Includes lens caps and either aluminum weaver style rings Specifications MAGNIFICATION: 3X-9X TUBE DIA. 30MM OBJECTIVE DIA. (MM) 40.00 FOV (FEET AT 100 YARDS) 36.6-13.6 EYE RELIEF (in) 2.76-3.15 EXIT PUPIL(MM) 13.3-4.4 RETICLE: RANGEFINDER N.W(OZ.) 20.0 LENGTH (in) 14.50 CLICK VALUE : 1/4 M.O.A EXTERIOR FINISH: RUBBER COATED LENS COATING:  RUBY MOUNT INCLUDED: WEAVER STYLE RINGS Manufacturer: NcStar Model Number: SEFFR3940R SKU: NC_SEFFR3940R more info